Frequently asked questions


Welcome to our FAQs – Find answers quickly and easily
We know that questions arise again and again – whether about using our products and services, technical details, or general topics. To help you find the right answers quickly and easily, we have put together a comprehensive FAQ page for you.

The app can be installed in just a few minutes, is fully configurable, and ready to use – all the details can be found in the FAQ.

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Our FAQ page is structured so that you can find the information you need in a variety of ways:

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📂 Table of contents: Our FAQs are divided into clear categories so you can navigate directly to your topic.

💡 Clear and understandable: All answers are concisely written, clearly explained, and regularly updated.


Whether you are looking for a quick solution or want comprehensive information – our FAQ page will help you If your question isn't listed, we'd be happy to help you personally.


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You can get lidX from your bank, your payment service provider (acquirer), your POS partner, or from our certified regional and international sales partners. We would be happy to arrange the appropriate acceptance agreement, including a lidX license, for you.

You can purchase licenses directly from us. Please contact us for a customized quote or further information.

We appreciate your interest in a partnership. Please contact us – we would be happy to discuss all the options with you personally.

lidX is an app that transforms smartphones, tablets, and other Android devices into a card payment terminal. It can be used anywhere there is mobile internet or Wi-Fi.

Yes, lidX supports contactless payments with credit and debit cards, as well as mobile wallets such as Apple Pay and Google Pay.

No, a standard Android smartphone with NFC is sufficient. No separate card reader is required.

Yes, lidX is ideal for retail, restaurants, delivery services, and all mobile service providers.

There are no acquisition costs, rental fees, or maintenance costs for traditional card terminals.

No, the costs are transparent. There are no long-term contracts or hardware costs.

Installation takes just a few minutes, so you can start accepting payments immediately.

Yes, lidX can be used on multiple smartphones simultaneously – with no additional rental costs.

Yes, since no special hardware is required, there is no wear and tear on mechanical parts such as buttons or magnetic stripe/chip card readers.

Simply install the app on a new device and carry on – without long downtimes.

As long as your device meets the lidX requirements, it can be used for years.

Yes, software updates keep the system up-to-date without the need to purchase new hardware.

Since no separate terminal is required, any salesperson, waiter, or delivery driver can accept payments directly on their smartphone. This speeds up the payment process and reduces waiting times.

lidX runs on Android-based devices such as smartphones, tablets, handheld devices, terminals, desktop POS systems, and professional payment devices.

Payments can be accepted contactless via NFC, via Bluetooth, via barcode or QR code scanning, or manually via data entry.

No, lidX also supports offline operation. Payments can be cached and synchronized later when a connection is available.

lidX can accept credit cards, debit cards, alternative payment methods (APMs), SEPA, and instant payments.

lidX can be used as a standalone terminal, in combination with a POS system, or as a pure payment service on mobile and desktop devices.

lidX supports numerous protocols such as ZVT, OPI, EP2, Nexo Retail, and ISO20022. This allows lidX to be easily connected to many POS systems and vending machines.

The lidX app supports over 100 different languages, including full translations for the user interface and payment receipts.

Yes, lidX offers both traditional thermal receipt printing and digital receipt output via QR code or email.

Yes, lidX offers various tipping features as well as an integrated cashback option for debit cards.

SoftPOS refers to the acceptance of credit and debit cards via a smartphone app. SmartPOS extends this concept with additional features such as alternative payment methods (APMs), POS interfaces (ZVT, OPI, ISO20022, etc.), receipt printing, digital receipts, tipping and cashback options, and much more.

Yes, SmartPOS offers more comprehensive functionality: In addition to traditional card payments, POS system connections, QR code payments, receipt printing, digital receipts, and advanced payment services such as cashback are also possible.

No, traditional SoftPOS solutions are usually limited to credit and debit cards. SmartPOS solutions such as lidX, on the other hand, also support APMs such as Alipay, WeChat Pay, PayPal, or Twint.

SmartPOS solutions such as lidX support interfaces such as ZVT, O.P.I, Nexo, EP2, and ISO20022 to enable connection to a wide variety of POS and vending machine solutions.

SmartPOS is a modern platform that accepts payments via NFC, QR code, or barcode, integrates APMs, and combines additional features such as receipt management, tipping, and security features.

Traditional payment terminals may come with built-in software or apps but do not qualify as SoftPOS or SmartPOS solutions. The key difference is system openness: SoftPOS and SmartPOS are applications that run on standard Android devices, allowing users to freely install additional apps, software tools, and payment services. In contrast, traditional terminals with chip or magnetic card readers are subject to strict regulatory requirements. These require certified and approved software environments and often prohibit the use of unauthorized third-party applications. As a result, app usage is usually limited to a vendor-specific app store, significantly reducing flexibility and scalability.

The payment methods in lidX are certified according to MPoC (Mobile Point of Interaction), CPoC (Contactless Payments on COTS), and PIN on Glass standards.

lidX has advanced security mechanisms, PIN entry options, alert functions for suspicious transactions, and banking-standard encryption.

Yes, all transaction data is end-to-end encrypted based on current PCI DSS standards and certified security modules.

In addition to encryption technologies, lidX uses device binding, tokenization, and biometric authentication to ensure the highest level of security.

Yes, lidX meets all regulatory requirements and is ideal for banks, acquirers, and payment service providers.

Through a comprehensive data protection concept, complete anonymization of card data, and secure transmission at bank standards.

lidX can be connected to almost any POS system via REST API, ZVT protocol, O.P.I., Nexo Retail, EP2, and ISO20022 interfaces.

Yes, lidX can be installed and operated directly on suitable Android-based POS systems.

Yes, lidX supports Wi-Fi, Ethernet, and mobile networks (LTE, 5G).

Yes, one lidX instance can be connected to multiple POS systems over a network and process payments from different sources.

No, thanks to flexible standard protocols and APIs, lidX is compatible with a wide range of modern POS systems.

Yes, lidX can be installed on multiple smartphones, allowing each employee to accept payments independently – without additional terminals or dedicated checkout stations.

Less hardware means lower costs, less maintenance, and more flexibility, as employees can collect payments on the go at any time.

Yes, delivery drivers can accept payments directly at the front door without having to manage cash or carry a separate terminal.

Waiters can accept payments directly at the table, speeding up service and reducing waiting times for guests.

Yes, since there are no terminals to manage or replace, each employee can work with their own device – ideal for businesses with many salespeople.

Yes, lidX can be easily integrated into existing POS software, making it a flexible addition to or even replacement for traditional terminals.

lidX can integrate various POS protocols, including:
  • ZVT (Payment Terminal Protocol) – Standard in German-speaking countries, easy to integrate
  • O.P.I. (Open Payment Initiative) – Widely used in Europe, ideal for modern POS systems
  • REST API – Flexible for cloud-based applications
  • NEXO – International standard for card acceptance
More under POS protocols

lidX can be flexibly integrated into existing POS systems without additional hardware. Conventional terminals often require complex configurations and hardware adaptations.

Thanks to its support for common protocols, lidX can be easily connected to existing POS systems – often without additional middleware or special hardware.

Yes, the REST API allows lidX to be seamlessly integrated into cloud and web-based POS systems.

Yes, all supported protocols meet high security standards and are PCI-DSS compliant, ensuring sensitive payment data is transmitted securely.

Yes, protocols such as ZVT or O.P.I. enable connection to existing systems, even if they were originally developed for conventional payment terminals.

Retail, restaurants, hotels, and delivery services benefit from easy integration and flexibility without expensive terminal hardware.

lidX supports over 100 languages across all menus, interfaces, and receipts – for merchants and customers.

Yes, merchants and customers can independently select their preferred language. This way, everyone receives information in their native language.

The customer receives the receipt in their language, while the merchant receives their receipt in the desired language.

  • Better comprehensibility for international customers
  • Fewer misunderstandings during transactions
  • Increased customer satisfaction through language adaptation

lidX enables receipt delivery in various ways:
  • By printing on the internal or a connected printer
  • By email directly to the customer
  • By QR code for easy download
  • By sharing via messenger or apps

Many traditional payment terminals only support a limited number of languages and do not offer personalized receipt output. lidX enables complete linguistic flexibility.

  • Tourism businesses
  • Retail with international customers
  • Restaurants with tourist traffic
  • Hotels & travel providers for guests from all over the world
  • Delivery services with international customer bases

lidX supports four different tipping functions:
  • Fixed tip (a set amount)
  • Percentage tip (e.g., 10% of the bill amount)
  • Rounding up to the nearest whole amount
  • Rounding down to the nearest whole amount

The customer can select the tip directly on the lidX display or enter it individually – quickly, easily, and intuitively.

Yes, lidX creates separate tip receipts for customers and employees to ensure maximum transparency.

  • Customers see exactly how much they tipped
  • Employees receive a clear statement of their tips
  • Simple accounting & tax receipts

  • More flexibility with four tip functions
  • Better transparency with your own receipts
  • Easier billing & documentation
  • Faster tip acceptance without misunderstandings

  • Restaurants & Bars
  • Taxis & Car Services
  • Hairdressers & Beauty Salons
  • Hotels & Tourism

With a cashback payment, the customer can receive additional cash from the merchant when paying by card – similar to an ATM.

When paying, the customer indicates how much additional cash they would like to withdraw. The amount is added to the card payment, and the merchant dispenses the cash directly.

  • Better service for customers – no extra trip to the ATM
  • Higher sales, as customers shop more in-store
  • Less cash at the register – reduces security risks

  • Free cash withdrawals with no bank fees (depending on the card)
  • Convenient cash withdrawals directly during purchases
  • More flexibility, as there's no need to search for an ATM

  • No special hardware terminal required – simply use the app
  • Quick activation and configuration via the lidX system
  • Flexible for various industries, e.g., retail and gas stations

Cashback is available in many countries with debit cards and some credit cards – depending on the terms and conditions of the respective bank.

APMs (Alternative Payment Methods) are alternative payment methods to traditional credit and debit cards. These include SEPA Instant Payment, Twint, Bluecode, iDEAL, Klarna, PayPal, MobilePay, Swish, and many more.

Customers around the world use different payment methods. With APMs, merchants can serve more customers, increase conversion rates, and make the payment process more convenient for everyone involved.

The most common APMs in Europe include:
  • PayPal – widely used online and mobile payment solution
  • Klarna – "Buy now, pay later" for flexible installment payments
  • Sofortüberweisung (Klarna Pay Now) – fast online bank transfer
  • SEPA Instant Payment – real-time bank transfer in euros
  • iDEAL – bank transfers for customers from the Netherlands
  • Bancontact – popular debit card payment in Belgium
  • Apple Pay & Google Pay – mobile wallets for fast, contactless payments
  • Twint – leading mobile payment system in Switzerland
  • Bluecode – European QR code payment method
  • Vipps – mobile payment solution in Norway
  • MobilePay – digital wallet for Denmark and Finland
  • Swish – real-time payment in Sweden
  • WeChat Pay & Alipay – popular payment methods for Asian customers in Europe

  • Accepts over 600 APMs worldwide – more payment options for customers
  • No additional hardware terminal required – simply use the app
  • Enables real-time transfers and QR code payments
  • Flexible integration into existing POS systems and online shops
  • Increased revenue opportunities through broader payment acceptance

Yes All APMs use modern encryption technologies and are certified according to the highest security standards, e.g., PSD2, PCI DSS, and EMVCo.

The desired payment methods can be easily added via the lidX dashboard – without complicated technology or long contract terms.

APMs incur lower transaction fees because they often do not require credit card networks or interbank fees. Bank transfers or wallet payments often have a fixed or very low percentage fee.

Credit card payments incur interchange, network, and processing fees, which can total up to 3% per transaction. APMs often avoid these fees entirely or significantly reduce them.

Payments via SEPA Instant Payment, iDEAL, or Swish are irrevocable. This means that merchants are not exposed to chargeback risk, as is the case with credit cards when customers reverse a payment.

While credit card payments often take 1-3 business days to be credited, payments via SEPA Instant Payment, Twint, or MobilePay are usually available in the merchant's account immediately.

APMs often use secure authentication methods such as online banking logins, QR codes, or biometric verification. This reduces the risk of stolen or counterfeit cards and minimizes fraud.

No Many APMs work directly via an app or web solution. In combination with lidX, the merchant can accept APMs directly on the smartphone without having to purchase expensive hardware.

Many customers prefer local payment methods such as Twint (Switzerland), iDEAL (Netherlands), or Swish (Sweden) because they allow them to pay quickly, securely, and without additional fees.

Yes APMs allow merchants to save costs, get their money faster, and offer more payment options for their customers. In combination with lidX, a flexible and affordable payment solution is created for modern commerce.

APMs often operate without credit card networks, which means merchants pay lower fees. In addition, bank transfers are often cheaper than card transactions and avoid chargebacks.

  • Full card and APM support without expensive add-on modules
  • No expensive hardware required, runs directly on a smartphone or tablet
  • Faster processing and lower fees through alternative payment methods
  • Increased flexibility – merchants can accept various payment methods worldwide

Definitely With the widespread acceptance of cards and APMs, every customer can pay with their preferred method. This increases sales, reduces abandoned carts, and improves the customer experience – a clear advantage over traditional terminals.

lidX terminals support all common card types, including debit cards (e.g., Girocard, Maestro, Visa Debit), credit cards (Visa, Mastercard, American Express, Diners Club), prepaid cards, and fleet and corporate cards.

The more payment options a merchant offers, the higher the likelihood of a purchase. Customers are less likely to abandon purchases when their preferred payment method is accepted. Tourists or business travelers, in particular, benefit from international cards such as UnionPay, JCB, Discover, or Diners Club.

Definitely With the widespread acceptance of cards and APMs, every customer can pay with their preferred method. This increases sales, reduces abandoned carts, and improves the customer experience – a clear advantage over traditional terminals.

The blended rate – also known as the total cost percentage – is a uniform average rate that payment service providers charge for accepting card payments. This rate combines all costs incurred, such as interchange fees, scheme fees (card network fees), and service provider surcharges, into a single percentage.

Advantage: Billing is simple and transparent – you know your fixed percentage per transaction.

Disadvantage: Because it is an average, the blended rate can be more expensive than a custom-calculated IC++ model for small amounts or certain card types.

The blended rate is well suited for companies that value predictability and simple calculation.

Interchange++ (IC++) is a transparent pricing model for accepting card payments. It consists of three components:

  • Interchange Fee (IC): The fee paid to the card-issuing bank
  • Scheme Fee (SC): The fee for the card network (e.g., Mastercard, Visa)
  • Service Provider Markup (++): The payment service provider's margin

Advantage: With IC++, you can see exactly how your costs are broken down – ideal for companies that value transparency and control.

Important: The individual components can vary depending on the card origin, card type, and transaction type and change regularly.

IC++ is particularly worthwhile for companies with higher transaction volumes that want to benefit from customized terms.Definitely With the widespread acceptance of cards and APMs, every customer can pay with their preferred method. This increases sales, reduces abandoned carts, and improves the customer experience – a clear advantage over traditional terminals.

Dynamic Currency Conversion (DCC) enables international customers to pay directly in their home currency. The current exchange rate is calculated in real time and presented to the customer for selection.

  • Higher sales: Customers feel more comfortable when they see the amount in their usual currency. This reduces abandoned carts.
  • Additional revenue: Merchants receive a commission on each DCC transaction, which increases sales.
  • Better customer experience: Tourists and international customers don't have to convert money themselves and have full price transparency.

  • Transparency: Customers immediately see how much they are paying in their currency.
  • Convenience: No recalculations or surprises on the credit card statement.
  • Choice: Customers can freely decide whether they want to pay in their local or home currency.
  • How does DCC on a lidX terminal differ from conventional card terminals?
  • Real-time exchange rate: lidX uses current, competitive exchange rates in seconds.
  • Seamless integration: No additional hardware or software required – DCC can be used directly via the lidX app.
  • Flexibility: Merchants can easily activate DCC and immediately reap the benefits.

Yes With DCC, merchants benefit from higher sales, happier customers, and additional revenue through commission sharing. lidX makes using DCC even easier and more efficient than traditional terminals.

VAT Refund allows international customers who shop abroad to reclaim the VAT they paid. This applies to non-residents who purchase goods for export.

lidX terminals support the digital processing of TAX Refund forms directly at the time of payment. The merchant captures the necessary data, and the customer automatically receives the required proof of refund.

  • Higher sales: Tourists buy more when they know they will get their VAT refunded.
  • Simple processing: No paperwork – processing takes place directly via the lidX terminal.
  • Customer satisfaction: A fast and straightforward process ensures a positive shopping experience.

  • Fast refund: The customer receives their tax amount easily and directly via the system.
  • Convenience: No tedious paper form filling out, just a digital, automated solution.
  • Clarity regarding the refund amount: The amount is displayed upon payment.

  • Completely digital: No need for physical receipts or stamps – the data is processed directly.
  • Integrated solution: lidX can handle the entire process without additional hardware or software.
  • Greater flexibility: Merchants can also offer TAX Refund on mobile devices, e.g., in hotels, boutiques, or at events.

Yes Merchants benefit from higher sales, happier customers, and less administrative effort. TAX Refund makes TAX Refund processing easier, faster, and more efficient than conventional terminals.

TAX Refund is particularly attractive for industries that serve many international customers and tourists. These include:

Retail & Luxury Goods
  • Fashion boutiques, designer stores, jewelry stores, watch retailers
  • Electronics stores (e.g., cameras, smartphones, laptops)
  • Perfume & cosmetic stores
Tourists like to buy high-quality products when they get their VAT refunded.

Hotels & Hospitality
  • Hotel shops & resort boutiques
  • Duty-free shops in hotels or airports
Guests can purchase exclusive products tax-free and take them home as souvenirs.

Art & Antiques
  • Galleries, art dealers, antique shops
International collectors benefit from the refund, which increases the incentive to buy.

Health & Wellness Industry
  • Opticians & Hearing Aid Specialists
  • Medical Devices & Beauty Clinics
Many travelers combine their stay with medical treatments or the purchase of high-quality health products.

Luxury Services & Events
  • Marinas & Luxury Car Dealers
  • Exclusive Events & Trade Fairs
Wealthy tourists especially value tax-free purchases for high-priced investments.

  • Fast processing without paper forms
  • More purchasing incentives for international customers
  • Increased customer satisfaction through simple tax refunds
  • Digital, flexible solution – can be used anywhere
With lidX, retailers in these industries can process tax refunds easily and efficiently – for more sales and satisfied customers

Digital receipts are electronic proof of payment that customers receive via email, QR code, or as a download – without the need for paper printouts

  • No costs for paper and printer rolls – saves on consumables and maintenance costs
  • Faster and easier archiving – all receipts available digitally
  • Environmentally friendly – reduces paper waste and improves sustainability
  • Modern customer communication – receipts can be shared directly via email or QR code

  • No risk of losing the receipt – accessible digitally at any time
  • No crumpled or faded paper – always legible
  • Convenient storage – ideal for warranties, returns, or accounting
  • Flexibility – choose between email, QR code, or download

  • No printer required – no hardware costs for receipt printing
  • Flexible output options – directly on the seller's smartphone or tablet
  • Fast and efficient – no waiting time due to slow thermal printers
  • Perfect for mobile retailers – receipts available anytime, anywhere
  • Digital receipts make the payment process easier, more sustainable, and more cost-effective – a real advantage for retailers and customers

Bonus and discount programs reward customers for their purchases, e.g., with points, discounts, or vouchers that they can redeem on future purchases.

lidX can support many international bonus programs, including:
  • Payback (Germany, Austria) – Collect & redeem points
  • DeutschlandCard – Discounts and points with partners
  • Supercard (Switzerland) – Points for purchases & exclusive rewards
  • IKEA Family – Discounts & special offers for members
  • Clubsmart (Shell, BP, OMV, etc.) – Fuel discounts & rewards
  • Twint Cashback (Switzerland) – direct cashback on payments
  • Carrefour Bonus Program (France, Spain) – discounts & shopping vouchers

  • No separate device required – bonus and card payments on one platform
  • Increased customer loyalty – customers benefit directly when shopping
  • Simple & fast processing – no card scanning required
  • Increased sales – customers buy more often when they benefit from discounts

  • Deduct points or discounts directly upon payment
  • Use all programs on one platform – no more searching for cards
  • Faster processing & less waiting time at the checkout

  • One app for everything – payment & bonus programs without additional devices
  • Easy updates – new programs can be flexibly integrated
  • Ideal for mobile retailers – customers benefit from loyalty programs everywhere
  • Digital & flexible solutions – No printed coupons or plastic cards required
With lidX, bonus programs are seamlessly integrated into the payment process, increasing customer satisfaction and relieving retailers of unnecessary hardware

lidX can be operated on a wide variety of Android devices – from standard smartphones and specialized terminals such as the Landi M20, Sunmi V2s, Sunmi L2S, and Zebra TC52 to stationary POS systems such as the Landi C20 Pro or the Sunmi D3 Mini.

lidX enables card payments on existing devices, thus saving the cost of purchasing separate terminals. It's also more flexible because different device types – mobile and stationary – can be used.

No, lidX works on many commercially available Android smartphones and tablets with NFC. For professional use, specialized Android POS terminals such as Sunmi, Landi, or Zebra are available, as they are particularly robust and optimized for continuous operation.

Yes, lidX supports both internal printers (e.g., Sunmi V2s, Landi M20) and external printers that can be connected via Bluetooth, Wi-Fi, or USB. This offers maximum flexibility for retailers.

An internal printer is ideal for mobile applications because it doesn't require an additional device. This is especially useful for delivery services, restaurants, and retail stores where a compact solution is required.

External printers are ideal for stationary POS solutions or when larger receipts need to be printed. High-performance printers with higher paper capacity can also be integrated.

Yes, digital receipts are an environmentally friendly alternative. Customers can receive their receipt via email, QR code, NFC, or direct approval on their smartphone – completely paperless

Yes, that's one of the great advantages of lidX. For example, merchants can combine stationary POS systems with lidX and simultaneously use mobile devices for payments on the go – all with a unified software solution.

lidX requires an NFC-enabled Android device with the appropriate security certification for card payments. Most APMs can be used without NFC. Some devices also have integrated functions such as barcode scanners or RFID readers, which can provide additional benefits depending on the application.

  • Lower costs: No separate terminal hardware required
  • Flexibility: Works on smartphones, tablets, professional Android POS devices, and most POS systems
  • Printer connectivity: Supports internal and external printers for maximum freedom of choice
  • Digital receipts: Easy sending via QR code, email, or NFC
  • Multifunctional: Can be combined with POS systems and other applications
Conclusion:
lidX enables card payments on virtually any Android device—whether it's a smartphone, mobile POS terminal, or stationary POS system. Thanks to integrated or external printing solutions, merchants can choose the optimal combination for their needs and benefit from flexibility, lower costs, and a modern, future-proof solution.

lidX can be used on smartphones, tablets, mobile POS terminals with integrated printers, rugged industrial handhelds, and stationary Android POS systems.
  • Smartphones & Tablets: Perfect for mobile payments and flexible deployments
  • Mobile POS terminals (e.g., Sunmi V2s, Landi M20): Integrated printer, ideal for restaurants, delivery services, and markets
  • Rugged industrial handhelds (e.g., Zebra TC52, Sunmi L2S): Use in logistics, field service, and retail
  • Stationary Android POS systems (e.g., Landi C20 Pro, Sunmi D3 Mini): Integration into existing POS software with lidX

  • Restaurants (waiters, food trucks, bars): Mobile payment at the table, integrated printer for hospitality receipts
  • Kiosks & Supermarkets: Android POS with lidX, customer displays for receipts and price overviews
  • Delivery services (parcel couriers, food deliveries): Payment directly at the door with a mobile device
  • Beach chair and jet ski rentals: Rugged handhelds for outdoor use with digital or printed receipts
  • Events & Trade Fairs: Fast payment processing, as no dedicated POS hardware is required

An internal printer is essential in the hospitality industry, retail, and delivery services because:
  • Receipts can be issued immediately
  • Paper receipts are often required for business payments
  • Customers prefer a physical receipt
Alternatively, an external printer can be used or a digital receipt can be sent via QR code, NFC, or email

  • lidX uses the screen for PIN entry, eliminating the need for a separate PIN pad.
  • Customers can enter their PIN directly and securely via the touchscreen, just like with modern payment terminals.

A customer display on Android POS or mobile devices enables:
  • Price and transaction overview for the customer
  • Display of tip options
  • Advertising or discount promotions during payment
Devices such as the Sunmi T2 Mini or Landi C20 Pro offer such dual-screen functions.

  • lidX can be integrated directly into POS software, eliminating the need for a separate payment terminal.
  • Receipts and payment data are transferred directly to the POS.
  • Supports external printers, scanners, and other POS system components.

  • Flexible: Runs on a wide range of devices – from smartphones to professional Android POS systems
  • Cost savings: No separate terminal hardware required
  • Mobile & stationary use: Perfect for restaurants, retail, and services
  • Integrated or external printing solutions for maximum flexibility
  • Digital receipts & multilingual support for international use
Conclusion:
lidX offers maximum flexibility for card payments – whether mobile with a smartphone, as a POS system with a customer display, or as a robust solution for field service. Thanks to integrated printers, PIN touchscreens, and digital receipts, retailers can make their payment processes more efficient and cost-effective.

A terminal ID is a unique identifier assigned to each individual payment terminal (e.g., at a retail checkout or self-service machine). It can be compared to the serial number of a smartphone – each device has its own to distinguish it from others. The terminal ID plays a crucial role in payment processing because it:

✔ Serves to identify the terminal in the payment network
✔ Precisely regulates the clear association between the originator (e.g., POS system, vending machine, or card machine) and the executor (terminal, payment module, or method)
✔ Enables the secure processing of payments
✔ Ensures the traceability and transparency of each transaction
✔ Ensures proper settlement between the customer, merchant, payment service provider, and bank

  • Identification: It helps banks, payment networks and merchants to uniquely identify each terminal.
  • Transaction tracking: Every transaction made at a terminal is linked to this ID. This allows for accurate tracking of payments.
  • Troubleshooting: If there are problems with a payment, the Terminal ID can help to quickly find the cause and resolve the problem.
  • Security: The Terminal ID also plays a role in ensuring the security of payments.

A terminal ID is usually a combination of letters and numbers. The exact composition may vary depending on the use case, payment network and provider.

The special feature of numeric terminal IDs (cTerminal IDs)
While many terminal IDs consist of a combination of letters and numbers, there are certain POS protocols that only accept numeric terminal IDs. These include:

👉 ZVT (payment terminal standard)
👉 SPDH (Standard POS Data Host)
👉 CB2 (CashBack Protocol Version 2)
👉 Pay@Table (ZVT integration for restaurants)

These purely numeric terminal IDs are also referred to as cTerminal IDs. The lowercase "c" stands for "cashier," meaning cash register, and emphasizes that these terminal IDs are specifically intended for use in cash register protocols and for controlling payment processes.

Yes, lidX supports POS systems with multiple screens, including customer displays. Please note that a separate touch display on the customer side is required to enter a PIN for larger amounts.

Yes, lidX enables the central connection of any number of devices via various APIs (e.g., REST API) and cash register protocols such as ZVT, OPI, or NEXO. This allows you to manage a widespread network efficiently and flexibly.

The lidX app updates automatically in the background. Both the application itself and all relevant payment SDKs and security keys are updated reliably and regularly.

The frequency depends on the payment methods used. Security keys are usually exchanged quarterly. Some payment methods require a monthly exchange.

An update usually takes about five minutes – depending on the internet connection and the scope of the update.

Do you have any questions?
We're happy to help! If your question wasn't answered in our FAQs or you would like more information, please don't hesitate to contact us. Our team looks forward to hearing from you and will assist you quickly and competently.