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Verifactu API for the Spanish Anti-Fraud Law compliance

Ensure seamless compliance with Tax Authorities’ Anti-fraud requirements by integrating our SIGN ES API into your software, covering VeriFactu systems.

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Are you a software vendor?

Easily adapt any management software (ERP, POS, PMS...) to comply 100% with the Anti-fraud Law. Stay updated with the legislation and implement changes easily.

Two people, possibly software vendors, sit in front of the computer screen and see how easily VeriFactu API by fiskaly adapts to management software: ERP, POS, PMS

Need to adapt your own software?

If you have developed your own business software and want to adapt it to the Anti-fraud law and VeriFactu, our solution caters to businesses of all sizes, ensuring seamless integration.

Person pays by phone on POS and VeriFactu API by fiskaly ensures seamless integration among business software & Anti-fraud law and VeriFactu

Why do you need aVerifactu API?

The Anti-Fraud Law 11/2021, effective from 2025, outlines the technical requirements for the new anti-fraud software and VeriFactu. By July of 2025, billing software will be required to meet compliance standards.

According to the Spanish Tax Agency

VeriFactu compliant

Advanced electronic signature

100% cloud-based

over6 billiontransactions

more than600kPOS operated

over97%satisfaction rate

Interested in complying with TicketBAI and Crea y Crece Law?

Achieve 100% compliance through a seamless SIGN ES integration: with TicketBAI in the Basque Country, as well as Veri*Factu and mandatory B2B e-invoice at the national level. Want to explore these regulations?

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No commitment. No integration costs.

Take advantage of our industry leadership for the most competitive prices in the market. Comply with the Anti-Fraud Law in Spain with compliant software.

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Features of SIGN ES VeriFactu API

Request Verifactu API pricing

One integration, multiple legislations

By integrating a single API, you will automatically comply with the Anti-Fraud Law (Veri*factu), TicketBAI and Crea y Crece Law.

Forget about errors and rejected files

We have developed a validation process to avoid file rejection. Convenient and error-free.

Digital signature and submission

Sign, chain and send the XML files to the National Tax Authorities (AEAT) in real-time. 100% confidential.

1-click data export

Filter and export your invoices with just one click, accessible through both the API and our dashboard.

Integrated digital certificate

Your customers will not need to request their own digital certificate to sign and send invoices, we take care of everything!

Offline incident management

If your system experiences a temporary loss of connection or has poor connectivity, don't worry! We've got you covered.

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We speak technology

Access our developer resources, including VeriFactu API documentation, our Quick start and guides.

Download the guide: Verifactu for software vendors in Spain 2025

Get ahead of the competition and turn fiscal compliance into an advantage with a comprehensive guide about Verifactu. Get to learn in detail about:

What the Antifraud Law and the Verifactu systems are
Who is affected and the implications of the law for software developers
How to avoid penalties for non-compliance
Technical requirements and how to adapt your software seamlessly
Verifactu API: what is it and how to integrate it into your software

FAQ about Anti-Fraud Law and VeriFactu systems

Interested? Request a first meeting

We're here to help with any questions and find the perfect solution.
Over 800 companies trust our fiscalization solutions. We've got you covered!

VeriFactu Highlights

API Verifactu: How to comply with the Anti-Fraud Law in Spain

The new Anti-Fraud Law in Spain requires SMEs and professionals to use invoicing software that meets Verifactu's technical requirements to ensure the traceability and authenticity of invoices. In this article, we explain what Verifactu is, how the changes will affect your business, and how to integrate a solution to comply with the regulation.

1/30/202512 min read

Everything you need to know about Tax Compliance in Spain for 2025

Get ready for Spain’s tax regulations in 2025. Learn how to comply with Verifactu, TicketBAI, SII, and the Crea y Crece Law. Find out what these changes mean for businesses and billing software and how our API SIGN ES can help you seamlessly adapt to all regulations with a single integration. Avoid penalties and optimize your invoicing.

2/10/20258 min read

What is Verifactu?: Frequently Asked Questions for Software Developers

In the webinars we’ve recently offered, we’ve received a significant number of questions about the regulation and our Verifactu API. That’s why we’ve prepared this post compiling the most frequently asked questions and their answers. Find the solutions you need here to adapt your software easily and comply with the Anti-Fraud Law.