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Verifactu API - legally compliant in Spain with efsta

With our unified API , document data is automatically converted into a legally compliant XML format and securely transmitted to the tax authority AEAT (Agencia Estatal de Administración Tributaria) in real time.

This means that companies reliably meet the requirements of the Spanish anti-fraud law (Ley 11/2021) and are fully compliant at all times.

efsta's middleware acts as a central interface for different tax requirements - in Spain with Verifactu as well as in other countries.

It integrates seamlessly into existing systems so that no system change is necessary and the implementation effort remains minimal.

Logo of the Spanish fiscal solution Verifactu with a yellow check mark – official marking for legally compliant accounting software in Spain.
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Why Verifactu is indispensable

The Spanish government has introduced a new standard for invoicing software with Royal Decree 1007/2023.

The aim is to combat the shadow economy, which is estimated to be worth 200 billion euros. From now on:

  • Document data must be unchangeable
  • Each invoice is linked by a hash chain
  • Changes or cancellations automatically generate new data records
  • All invoices are reported to the AEAT almost in real time

Only with a Verifactu-compliant system can companies avoid penalties and operational risks.

fiscalization Spain

Verifactu API from efsta - Your advantages

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Legal certainty guaranteed

Our systems are designed to transfer tax-relevant data securely and efficiently to the Spanish authorities.

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Easy integration

Existing ERP and POS systems can be connected via our middleware. No costly new development necessary.

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Real-time validation by the AEAT

Immediate feedback ensures maximum transparency and minimizes sources of error.

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Future-proof solution

As Europe increasingly relies on real-time reporting (Italy, Portugal, France), Verifactu is the logical step towards digital tax transformation.

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Reduced development and operating costs

Our API takes care of the technical requirements such as XML creation, QR code, time stamp and transmission - saving you time and resources.

Functionality at a glance

The Spanish tax authority AEAT has set binding deadlines for the introduction of Verifactu. Companies, manufacturers and the self-employed must implement the requirements in good time.

1. data transfer

Your system sends document data to our middleware.

2. automatic processing

Creation of the legally required XML data records including hash chain, SIF ID and QR code.

3. real-time transmission

Data is sent directly to the AEAT and confirmed.

4th archiving

Secure, unchangeable storage with export and check options.
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Deadlines and obligations

The deadlines are binding and require timely preparation:

  • July 29, 2025 - Software manufacturers may only sell compliant systems
  • January 1, 2026 - Companies (legal entities) must use Verifactu
  • July 1, 2026 - mandatory for self-employed and freelancers

Anyone who ignores these deadlines risks fines of up to €150,000 per year.

Verifactu vs. non-verifactu

Although the regulation also permits non-verifactu systems, they harbor high risks:
  • Complex certificate and signature management
  • No real-time validation by the AEAT
  • Risk of future migration, as Europe is clearly moving towards real-time control

Conclusion: Only Verifactu offers maximum security, transparency and sustainability.

Why efsta is your partner

  • Many years of experience in international fiscalization systems
  • Modular middleware for fast integration
  • Support with certification and self-declaration of conformity
  • Customers throughout Europe rely on our solutions

Secure your Verifactu compliance now

Take advantage of our free initial consultation and find out how you can adapt your software to Spanish requirements with minimal effort.

Individual advice from our experts

We are always available to answer your questions and find a suitable solution for your requirements.
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FAQ about Verifactu

Do all companies have to use Verifactu?
What happens in the event of non-compliance?
How does the Verifactu API work?
Is Verifactu the same as e-invoicing?

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