Cryptographic Stamp (ZATCA)

ZATCA-issued digital stamp applied during clearance to authenticate B2B invoices

What is the ZATCA Cryptographic Stamp?

The ZATCA cryptographic stamp is a digital signature applied by ZATCA to cleared standard (B2B) invoices, providing non-repudiable proof that the invoice was validated and authorised by the tax authority at a specific timestamp.

Overview

During clearance, the supplier's signed invoice is transmitted to Fatoora; ZATCA validates schema and business rules, then applies its own XAdES-based cryptographic stamp to the invoice XML before returning it. Only stamped invoices are legally valid for B2B VAT deduction. The stamp's signature can be verified by any party using ZATCA's public certificate.

Key Points

Digital signature applied by ZATCA during clearance
XAdES format, verifiable with ZATCA public key
Required for legal validity of B2B invoices
Enables input VAT recovery for buyer

In Practice

A buyer's AP system verifies the ZATCA stamp on an incoming invoice against ZATCA's published certificate; if valid, the invoice is posted and input VAT recovered — if not, the invoice is returned to the supplier.

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