VeriFactu Overview

VeriFactu

VeriFactu Overview

VeriFactu is Spain’s real-time invoice reporting system for the AEAT (Agencia Estatal de Administración Tributaria).

What is VeriFactu?

VeriFactu requires businesses to register invoice data with the tax authority in near real-time, with strict requirements for:

• Hash chaining — Each invoice links to the previous via SHA-256
• Digital signatures — XMLDSig for integrity and non-repudiation
• Record types — Alta (issue), Modificación (modification), Anulación (cancellation)

How Kreyo Helps

Kreyo abstracts the complexity:

1. Simple API — Submit invoice data, we handle the XML and crypto
2. Automatic chaining — We maintain your hash chain
3. Certificate management — Upload once, use always
4. Retry logic — Automatic retry for AEAT outages

Core Concepts

• Concepts — Hash chains, records, and certificates
• Hash chain — Deep dive into SHA-256 chaining
• Certificates — Managing signing certificates

API Endpoints

• POST /verifactu/v1/registros/alta — Register an issued invoice
• POST /verifactu/v1/registros/modificacion — Modify a record
• POST /verifactu/v1/registros/anulacion — Cancel a record
• GET /verifactu/v1/consulta — Query your records