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 Spain
To assist businesses in navigating these evolving fiscal requirements and to offer tailored solutions:
- API: Our API ensures compliance with the VeriFactu system by integrating seamlessly with existing billing software, POS or ERP systems. It facilitates the generation of compliant XML files, supports invoice chaining and enables secure transmission to the AEAT (Spanish Tax Agency).
- Digital Receipt Solutions: Aligning with Spain’s move towards digitalization, fiskaltrust provides digital receipt services that comply with legal standards, enhance customer convenience and reduce environmental impact.
By leveraging fiskaltrust’s expertise and solutions, businesses can ensure seamless compliance with Spain’s fiscalization mandates, thereby minimizing legal risks and fostering trust with tax authorities.
VeriFactu: Nationwide Fiscalization Standard
The VeriFactu system is Spain’s upcoming nationwide fiscalization standard, designed to prevent invoice
tampering and improve tax compliance. It mandates the use of invoicing software that ensures transaction
integrity and real-time or on-demand submission to AEAT. Spain has introduced systems like TicketBAI in
the Basque region and is set to implement VeriFactu nationwide. Additionally, the SII (Immediate Supply of
Information) system plays a crucial role in real-time VAT reporting.
Key Features of VeriFactu
- Mandatory invoice security:
Software must prevent modification or deletion of billing records. - Real-time or on-demand reporting:
Invoices must be electronically signed or directly transmitted to AEAT. - Sequential invoice chaining:
Ensures transparency and prevents fraud.

Implementation Timeline
October 28, 2024
VeriFactu’s technical specifications published.
July 29, 2025
Software providers must update their systems.
2026
Expected enforcement for businesses.
VeriFactu:
- Nationwide Rollout:
- Set to be implemented across Spain, this system mandates the use of invoicing software that prevents the alteration or deletion of billing records.
- Technical Requirements:
- Software must generate an XML file for each transaction, chain invoices sequentially, and allow real-time or on-demand submission to the Spanish Tax Agency (AEAT).
TicketBAI (TBAI):
- Regional Implementation:
- Mandatory in the Basque Country, requiring businesses to use certified invoicing software that ensures realtime.
- Objectives:
- Enhance transparency and prevent tax evasion by ensuring all transactions are recorded and reported promptly.
SII (Immediate Supply of Information):
- Real-Time VAT Reporting:
- Requires businesses to submit detailed transactional data, including invoices and associated tax information, to the tax administration in near real-time.
Ensure your business is ready for Spain’s evolving fiscal regulations. Contact fiskaltrust to integrate SIGN ES API and stay compliant effortlessly.
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
With fiskaltrust’s API, fiskaltrust provides a fully compliant VeriFactu solution, integrating seamlessly into POS, ERP or billing software. This ensures businesses meet all AEAT requirements without operational disruption.

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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