TL;DR — Quick Summary

Learn how to identify and solve the most common stamping errors in CFDI 4.0 Electronic Invoices (RFC, Name, Tax Regime, and Zip Code).

CFDI 4.0 Stamping Errors

The migration to CFDI version 4.0 in Mexico introduced extremely rigorous validations. If you use billing systems like Aspel SAE, Facture, or CONTPAQi, you’ll likely encounter errors when “stamping” (digitally certifying) an invoice.

Unlike CFDI 3.3, CFDI 4.0 rejects the invoice if the client data isn’t an exact copy of the SAT database.

Prerequisites

  • Billing system updated to CFDI 4.0.
  • Client’s updated Tax Status Certificate (CSF).
  • Valid Digital Seal Certificates (CSD).

Common Errors and Solutions

1. Receiver Name Error

This is the #1 error.

  • Problem: Including the corporate regime (S.A. de C.V.) or not using uppercase.
  • Solution: Write the name EXACTLY as in the CSF.
    • Incorrect: EMPRESA EJEMPLO, S.A. DE C.V.
    • Correct: EMPRESA EJEMPLO

2. Zip Code Error

  • Problem: Zip Code doesn’t match the SAT’s registered fiscal address.
  • Solution: Put exclusively the Zip Code on the current CSF.

3. Tax Regime & CFDI Use Incompatibility

SAT restricts which CFDI Uses apply to which Tax Regimes.

  • Problem: Incompatible CFDI Use chosen.
  • Solution: Review SAT’s matrix. If in doubt, “S01 - Sin Efectos Fiscales” is often a fallback for unlisted regimens.

4. Expired CSD Certificate

  • Problem: The PAC throws a “Invalid Seal” error.
  • Solution: Renew your CSD. It takes 24-72 hours for PACs to recognize newly generated certificates.