TL;DR — Quick Summary
Fix errors generating or renewing the SAT Digital Stamp Certificate (CSD) for CFDI invoicing in Mexico.
SAT CSD: Error Generating or Renewing Digital Stamp Certificate for Invoicing
💼 Complete CFDI and Electronic Invoicing Guide
Everything about CFDI 4.0, SAT certificates, stamping, invoice cancellation and common errors
View all CFDI guides →Frequently Asked Questions
What is a CSD?
Certificate issued by Mexico's SAT required to digitally stamp invoices (CFDI). Composed of .cer (certificate) and .key (private key) files.