What procedures can the Natural Person Certificate be used for?
Last updated: 10/06/2026
This digital certificate is your official identity on the internet. It is used to carry out online procedures and sign documents with full legal validity (equivalent to your handwritten signature).
Common uses include:
- Filing tax returns with the Tax Agency.
- Checking your employment history with Social Security.
- Paying municipal fines or taxes.
- Signing rental, employment, or commercial contracts.