The official source behind 3 verified facts in the GrowIN Data Ledger.
| Fact | Value | Verified |
|---|---|---|
| What the NISS is | The Número de Identificação da Segurança Social (NISS) is the number that lets a person access rights and meet obligations in the Portuguese Social Security system (Segurança Social). | |
| Who needs a NISS | People who work or make social-security contributions in Portugal — employees, the self-employed (trabalhadores independentes), and members of statutory bodies (membros de órgãos estatutários / MOE). It is required to take up employment or register as self-employed. | |
| Automatic assignment (Portuguese citizens & companies) | Portuguese citizens holding a Citizen Card (Cartão de Cidadão) and legal entities (companies) are assigned a NISS automatically and do not apply for it. |
