To obtain the Social Security Number (Número de Segurança Social, NISS) in Portugal, you usually need: a passport, NIF (individual tax number), and proof of your professional status (employment contract, self-employment certificate, etc.).
In detail:
• Identity document: This can be a valid passport, residence permit card, or a registration at AIMA (Agency for Integration, Migration and Asylum).
• NIF: The individual tax number (NIF) is required for registration with the tax authorities.
• Proof of professional status:
• If you are employed, you need to provide a copy of your employment contract.
• If you are self-employed, you need to provide your business registration certificate and contracts with clients.
Additional documents (in some cases):
• Rental contract: Sometimes proof of residence is required, such as a rental agreement.
• Certificate from Junta de Freguesia: Alternatively, you can provide a certificate from the local parish administration (Junta de Freguesia), signed by two neighbor witnesses confirming that you actually live at the address.
• Utility bills: If you don’t have the certificate, you can provide utility bills (gas, water, electricity) in your name.
This summary reflects the typical documentation requirements for applying for a NISS in Portugal.