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RFC format check
Validate that an RFC string matches common persona física (13) or persona moral (12) character patterns before you paste it into bank, payroll, or invoice forms. This is format-only — it does not query SAT or prove the RFC exists.
How to use
- Paste the RFC (letters and digits).
- Read pass/fail for length and character pattern.
- Fix typos, then confirm with your official ID / Constancia.
What the tool does
Checks RFC length and alphanumeric pattern on-device.
What the tool does not do
Does not call SAT, verify against CURP, or prove tax registration.
Tips
- Homoclave typos are the most common failure — retype carefully.
- Use uppercase; strip spaces and hyphens before checking.
FAQ
- Does this prove the RFC is real?
- No — format only. Use SAT / Constancia for official status.
- Persona física vs moral?
- Física is typically 13 characters; moral 12. Patterns differ.
- Is data uploaded?
- No.
- Is it free?
- Yes.
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