# What is RFC?

The RFC is Mexico's tax ID, issued by the tax authority SAT. A company's RFC has 12 characters and a natural person's has 13. SAT keys its public lists by RFC. No Mexican plant source publishes it, so a Mexican record on Testigo has no tax ID. Ask the plant for it.

- The Mexican RFC, and how to check one: https://testigomexico.com/guides/mexican-rfc
- The SAT 69-B list, explained: https://testigomexico.com/guides/sat-69b-list
- Check a Mexican supplier by RFC: SAT 69-B and more: https://testigomexico.com/check/mexico
- How to check a supplier in Latin America before you visit: https://testigomexico.com/guides/check-supplier-latin-america
- Glossary: the words behind every record: RFC (Registro Federal de Contribuyentes): https://testigomexico.com/glossary#rfc


Cite as: Testigo, "What is RFC?", https://testigomexico.com/questions/what-is-rfc, data file 2026-10-12.

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This is the Markdown version of https://testigomexico.com/questions/what-is-rfc. Testigo: Testigo is supplier intelligence for people who source from Latin America: a search over manufacturers taken from the official public registry of each country. Each record shows its source, its date and what was not checked.