Empowering Developers with Reliable Compliance Across Europe
Market selection
Integration Partners

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 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.
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

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
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.

Sometimes it’s easier to just talk.
Contact Usfiskaltrust’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.
fiskaltrust Academy – Empowering Compliance & Innovation
Master compliance, drive innovation – Start your learning journey today
fiskaltrust Academy





