How to use Validate CUIT / CUIL (Argentina)
Paste a CUIT or CUIL (with or without hyphens) and instantly check whether its check digit is correct. Click Process, then download or copy the result when it is ready.
Privacy and output quality
It verifies the 11 digits and recomputes the check digit with the mod-11 algorithm. It checks that the number is well formed; it does not query AFIP/ARCA. Local processing.