Empowering Developers with Reliable Compliance Across Europe

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Build once, deploy everywhere. fiskaltrust empowers POS developers with powerful open-source middleware, modular APIs and expert-led onboarding to ensure seamless fiscalization compliance across Europe.

fiskaltrust’s Middleware offers a robust, flexible, and cost-effective solution for businesses seeking compliance with diverse fiscal regulations across Europe. Its standardized interface, multi-platform support, and open-source transparency make sure that businesses can focus on their main tasks while ensuring legal compliance, thereby providing peace of mind and operational efficiency.

fiskaltrust’s solutions for Poland

Poland requires POS systems to follow strict fiscal rules defined by the Ministry of Finance and supervised by Krajowa Administracja Skarbowa, KAS. All merchants must use certified fiscal devices that secure sales data and issue receipts that follow the national format. Modern online cash registers, kasy online, send transaction data to the Central Repository of Cash Registers, CRK, in real time.

Key requirements in Poland

  • Individual Recording Obligation. Each sale must be recorded by a certified fiscal device.
  • Receipt Issuance Obligation. A fiscal receipt with the Polish layout must be issued for each transaction.
  • Certified Device Obligation. Merchants must use a certified cash register, either an online cash register connected to CRK or a certified hardware device with the required fiscal module.
  • Real Time Transmission. Online cash registers must report receipt data to CRK for audit purposes.

Key Benefits for Developers

  • Standardised API that keeps the integration clear and predictable.
  • Support for certified Polish fiscal devices without vendor lock in.
  • Compliance with national requirements without changes to core POS logic.
  • Automatic updates that follow new rules from the Ministry of Finance.

Integration with the fiskaltrust Middleware API

Developers integrate one API that handles signing, receipt formatting, communication with fiscal devices and transmission to CRK. This removes the need to build and maintain separate logic for each Polish device type.

  • Local and cloud deployments are supported.
  • Multiple cash register models can be used through one integration path.
  • The middleware aligns POS transactions with the Polish fiscal record and the required CRK messages.

Compliance Automation

The middleware validates the data, applies the Polish fiscal rules and ensures the creation of receipts with all mandatory fields, including VAT structure, fiscal signatures and device identifiers.

  • Reporting to CRK is handled automatically for online systems.

Continuous EU-Wide Compliance

fiskaltrust monitors regulatory changes from the Ministry of Finance and KAS. Updates are applied in the middleware so developers do not need to change their POS logic.

  • New rules and device requirements are added as soon as they are introduced.
  • Updates are rolled out centrally with minimal disruption to merchants.
  • Systems remain compliant and stable during regulatory changes.

Stable API. Open source. Audit-proof receipts. No vendor lock-in.

API

Modular API Design & Scalable

fiskaltrust APIs are based on a service-oriented architecture, enabling integration at multiple layers.

The fiskaltrust APIs plug straight into our open-source Middleware, taking care of signing, receipt chaining and export logic so you don’t have to. With both HTTP(S) and gRPC support, they fit cleanly into any architecture whether this is cloud-native or on-prem. Everything’s audit-proof by design and the PosDealer API lets you automate onboarding and deployments at scale.

Modular API Design & Scalable

  • POS System API: Receipts, payments, digital export
  • Receipt API: Create and manage digital receipts
  • PosDealer API: Automate onboarding and deployment for POS dealers
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Open-Source

Open-Source fiskaltrust Middleware

Leverage fiskaltrust's robust, open-source middleware to integrate fiscalization compliance into your POS solutions across Europe.

The fiskaltrust open-source middleware solution designed to streamline fiscalization compliance, digital receipts, payments and secure data archiving. It connects Point-of-Sale systems with local legal requirements through a harmonized API and offers scalability and flexibility across Europe’s diverse fiscal environments.

Why fiskaltrust Open-Source?

  • Seamless POS API Integration (REST/SOAP/JSON)
  • Auto-updating to comply with new regulations
  • Multi-country fiscalization logic
  • Modular architecture (Queue, SCU, Helpers)
  • Secure and auditable transaction signing
  • Transparent, fully documented code
Freemium Bundle

Why Middleware Matters –
Simplify Compliance with fiskaltrust

Simplify Compliance with fiskaltrust Freemium

fiskaltrust
Middleware

Mangement

  • Portal
  • CloudAPI
  • Self-Hosting

Compliance

  • Open-Source
  • Receipt Chaining & Signing
  • Local Journal
  • Local Data Export

Receipt

  • Open-Source
  • Cloud based, interactive
    visualization of receipt
  • InStore-App

Payment

  • Open-Source
  • Cloud based Terminal Gateway

fiskaltrust Academy – Empowering Compliance & Innovation

Academy

fiskaltrust Academy

The fiskaltrust Academy equips businesses, developers, and partners with the knowledge and skills to navigate fiscalization effortlessly.

fiskaltrust Academy – a structured training and onboarding program designed to help POS creators and integration partners easy implement fiskaltrust.Middleware while ensuring compliance with fiscal regulations across Europe.

fiskaltrust Academy

Sometimes it’s easier to just talk.

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