Mexico RFC & CURP Validator – Free Online Tool
Mexico RFC & CURP Validator
Check the formatting and checksum of Mexican identity numbers.
About the Mexico RFC & CURP Validator
Validating Mexican tax and identity numbers is critical for payroll and business compliance. The Mexico RFC (Registro Federal de Contribuyentes) and CURP (Clave Única de Registro de Población) Validator ensures that any inputted ID strictly adheres to the official formatting rules mandated by the Mexican government. It checks the 13-character length for personal RFCs, the 12-character length for corporate RFCs, and the 18-character alphanumeric structure of the CURP, including verifying the standard dictionary of states and date formats. Use our tool to avoid costly data entry errors in Mexico's SAT (Servicio de Administración Tributaria) systems.
Frequently Asked Questions
What is the difference between RFC and CURP?
CURP is an 18-character identification number for all Mexican citizens and residents, containing birth details and name initials. RFC is a tax identification number used for invoicing and payroll, which is 13 characters for individuals and 12 characters for businesses.
How does the tool validate them?
It uses advanced regular expressions to verify the exact alphanumeric structure, checks if the encoded date of birth is logically possible, and ensures the structure matches official government guidelines.
Does this check SAT databases?
No, this tool performs structural and algorithmic validation only. To check if an RFC is completely active, you must use the official SAT web portal.
How to use the Mexico RFC & CURP Validator tool
Using our Mexico RFC & CURP Validator is incredibly easy and entirely free. We designed our Developer Tools specifically for everyday users who need to get things done quickly without downloading complicated software or registering for an account.
- Enter Document: Input an RFC (12-13 chars) or CURP (18 chars).
- Validate: Check the format and dictionary logic instantly.
100% Secure
Your files are encrypted and automatically deleted from our servers after 1 hour. Your privacy is guaranteed.
Lightning Fast
We use high-performance cloud processing to ensure your files are ready in seconds, not minutes.
Works on Mobile
No app installation needed. Use our tools seamlessly on iOS, Android, Mac, or Windows.