PortugalCitizen Card
Also known as: NIF · Número de Identificação Fiscal · Tax Identification Number
Specification
Format
This number has no simple display mask — its structure is defined by validation rules. See the references below for details.
- Length
- 9 characters
- Checksum
- Yes
Check digits are recomputed and verified.
- Embedded data
- No
This number encodes no extractable personal data.
Sample test value
840061870This value was randomly generated to satisfy the format and check-digit rules. It is not a real ID and does not belong to any person.
Ready to check a number?
Validate a Portugal Citizen Card now — it runs in your browser and the number never leaves your device.
Try it in the validatorValidation rules for Portugal come from the open-source idnumbers library. Report a format issue on GitHub