Empowering Developers with Reliable Compliance Across Europe

fiskaltrust’s Middleware (open-source) is a comprehensive solution designed to simplify fiscal compliance for point-of-sale (POS) systems across various European markets.
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.
Integration Partners

fiskaltrust’s Solutions for Portugal
Portugal’s fiscal regulations require businesses, POS developers and dealers to comply with evolving standards, including SAF-T, ATCUD and QR codes. fiskaltrust provides a standardized, automated middleware solution to simplify compliance, reduce complexity and ensure seamless integration with the Portuguese Tax Authority (AT – Autoridade Tributária e Aduaneira).
Our Services
Middleware Integration:
Our middleware integrates effortlessly with existing POS systems, automating tax reporting and ensuring compliance with SAF-T requirements.
Standardized API:
We provide a standardized API that facilitates seamless integration for POS developers, ensuring that all fiscalization features are compliant with Portuguese regulations.
Centralized Management:
For businesses operating in multiple locations, our solutions allow for centralized management of fiscal data, ensuring uniform tax data across all sites.
Automated Updates:
Our solutions include automated updates to reflect new tax laws and regulatory requirements, reducing the risk of non-compliance for end-users.
By partnering with fiskaltrust, businesses in Portugal can confidently manage the complexities of fiscalization compliance, keeping your operations fully aligned with all regulatory requirements.
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.
International Interface
Multi-Platform Support
Documentation & Support
Audit-Proof Receipt Chaining
fiskaltrust’s API
We offer a fully compliant SAF-T, ATCUD solution through our API, designed to integrate easily with POS, ERP and billing software. Our solution enables businesses in Portugal to meet Autoridade Tributária e Aduaneira requirements while maintaining smooth and uninterrupted operations.

By abstracting the complexities of national fiscalization laws, it enables businesses to focus on their core operations while ensuring adherence to local regulations.
POS System API
The fiskaltrust POS System API serves as the central interface between POS systems and the fiskaltrust Middleware. It offers a comprehensive set of functionalities, including the fiscalization (or signing) of receipts, execution of payments via various providers, digital receipt printing and data export from the Middleware.
The POS System API enables POS developers to integrate their systems seamlessly with fiskaltrust’s Middleware, ensuring adherence to fiscal regulations. This integration provides a unified approach to receipt management, payment processing, and data handling, thereby simplifying compliance and enhancing the overall efficiency of POS operations.

Key Features
- Receipt Fiscalization: Process and sign receipts to ensure compliance with fiscal laws.
- Payment Processing: Integrate with multiple payment providers to handle transactions seamlessly.
- Digital Receipt Printing: Generate and manage digital receipts, enhancing customer experience and reducing paper usage.
- Data Export: Facilitate the export of transaction data for auditing and compliance purposes.
POSdealer API
The fiskaltrust PosDealer API is designed to empower POS dealers by providing functionalities to efficiently onboard POS operators and manage their Middleware installations. This API facilitates the automation of tasks such as configuring Middleware, managing product rollouts and overseeing POS operator accounts.

Key Features
- POS Operator Management: Onboard and manage POS operators, including auto-inviting new operators (specific to Germany).
- Product Production: Produce products based on entitlements, including listing available entitlements and producing queue or outlet products following rollout plans.
- Middleware Configuration Access: Retrieve and list Middleware configurations associated with POS operators.
- Order and Rollout Plan Retrieval: Access detailed information about orders and available rollout plans.
By integrating the PosDealer API, POS dealers can streamline the deployment and management of fiskaltrust’s Middleware across multiple operators. This automation reduces manual effort, minimizes errors and accelerates the rollout process, allowing dealers to efficiently scale their operations and ensure consistent compliance with fiscal regulations.
Receipt API
The fiskaltrust Receipt API is a comprehensive solution designed to facilitate the creation, processing, and management of digital receipts within Point-of-Sale (POS) systems. It enables seamless integration between POS applications and fiskaltrust’s Middleware, ensuring compliance with fiscal regulations across various countries.

Key Features
- Standardized Data Structures: Utilizes the ReceiptRequest and ReceiptResponse data structures to ensure consistent communication between POS systems and the Middleware.
- Digital Receipt Generation: Automatically generates digital receipts stored securely in the fiskaltrust.Cloud, accessible via unique, tamper-proof HTTPS links.
- Enhanced Consumer Interaction: Offers features like live consumer feedback, advertising space, and integration with loyalty programs through partners like ReceiptHero.
By integrating the fiskaltrust Receipt API, businesses can:
- Ensure Fiscal Compliance: Automatically adhere to national fiscal laws, reducing the risk of non-compliance penalties.
- Enhance Customer Experience: Provide customers with convenient, digital receipts that are easily accessible and environmentally friendly.
- Streamline Operations: Simplify the receipt management process, reducing the need for physical storage and associated costs.
- Leverage Data Insights: Gain valuable insights from digital receipt data to inform business decisions and marketing strategies.
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Subscribe hereEnhancing Collaboration and Compliance with Open-Source Middleware

The Middleware’s open-source design fosters community collaboration and trust, ensuring transparency and inclusivity. It supports comprehensive fiscalization by accommodating key signing devices like TSEs in Germany and smart cards in Austria, ensuring compliance across jurisdictions. Seamless integration with fiskaltrust’s cloud platform simplifies updates, maintenance, and monitoring, enhancing operational efficiency.
Why Middleware Matters - Simplify Compliance with fiskaltrust
The Middleware simplifies compliance by offering a standardized interface that eliminates the complexity of navigating different national fiscal laws, enabling POS systems to comply effortlessly
It is also a cost-efficient solution, provided free of charge, which reduces the expenses involved in creating and maintaining separate compliance systems for various markets. Furthermore, the Middleware offers operational flexibility by supporting both on-premise and cloud deployments, allowing businesses to select the setup that best suits their specific needs.
Why Middleware Matters – Simplify Compliance with fiskaltrust
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