The new docs.trellix.com features a modernized UI and AI-powered conversational search. Content is currently available in English, with additional languages launching in early November 2026. We hope you enjoy the updated experience.

Portuguese Social Security Number

Published on Sep 2, 2026

1 minute(s) read

Prev Next

Portuguese social security number is the NISS (Número de Identificação de Segurança Social) 11-digit number issued to people working in Portugal.

Validator

Portugal Social Security Number — Validates the position weighted Mod10 checksum.

Matched expressions

Regex expressions	Description	Score
`(?:\b[0-9]{11}\b)`	Matches an 11-digit number of the format NNNNNNNNNNN.	1

Ignored expressions

None

Was this article helpful?