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SIGN ES: meet multiple Spanish fiscal laws with one API

Easily integrate SIGN ES via API and ensure 100% compliance with Verifactu, TicketBAI and B2B e-invoicing regulations in Spain.

Fiscalization compliantSeamless integration

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SIGN ES is Verifactu-ready

Verifactu refers to invoicing systems that comply with the Spanish Anti-Fraud Law and generate verifiable invoices. These include a QR code and connect directly to the Spanish Tax Agency. All invoicing software must comply by July 29, 2025.

Person pays by card at POS and SIGN ES software, which complies with Anti-faud law, generates verifiable invoice

SIGN ES with TicketBAI

A software-based fiscalization system that provides transaction data to the authorities in real-time. Ensuring compliance with TicketBAI regulation to be implemented from 2022 to 2026 in Basque Country's three provinces (Álava, Guipúzcoa y Vizcaya).

Three people sit at the table with their laptops with SIGN ES for TicketBAI and VeriFactu

e-invoice in Spain

Get ahead and comply with Spain’s Crea y Crece Law by adapting your software to B2B e-invoicing with SIGN ES. Explore the benefits, features, and FAQs of our API.

Person has an open laptop in front with the e-invoice details by fiskaly, which complies with Crea y crece Law in Spain

Why SIGN by
fiskaly.

Easy API integration

Our API easily integrates with your POS system so that you can comply with TicketBAI and Ver*factu without any software change.

Data management

Processes - such as rollout to all customers - are automated via the management API.

Fully certified

We provide the certifications required to ensure SIGN ES compliance with various regulations. Our infrastructure is ISO 27001 & 9001 certified and follows strict security protocols.

Resource saving

Automation, easy data management, no hardware - environmentally friendly and resource-efficient.

Seamless integration

SIGN ES is seamlessly integrated with all fiskaly services - even across countries.

Free testing

Get to know how easily and efficiently our system works before signing a contract.

over6 billiontransactions

more than650kactive POS

over97%satisfaction rate

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We speak technology

Developers find all information about our services, including API documentation, guides, and quick starts on our developer website.

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!

SIGN ES FAQs

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

SIGN ES highlights

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.

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.

6/23/20258 min read

Verifactu: FAQs to know before mandatory compliance for software developers

July 29, 2025 is just around the corner, and many questions remain about mandatory Verifactu compliance. That’s why we created this article, to clearly answer the most frequent questions. Whether you're a software developer or a taxpayer... we’ve got you covered!