Clear information on NIF, NISS, healthcare, AIMA, residence and Portuguese nationality — organised for people who need quick answers, especially on mobile.
You do not need to know which public body is responsible. Start with your problem.
NIF, NISS, healthcare and practical first steps.
First permit, renewal, family, work, study and transitional cases.
Check the current renewal channel and do not confuse renewal with a first permit.
NISS, contributions and the documents commonly linked to employment.
Residence, marriage, descent and other routes have different requirements.
Find AIMA, CLAIM, consular and emergency contacts.
This is a practical guide, not a mandatory legal calendar.
The tax identification number is used for many everyday matters such as contracts and banking.
The Social Security identification number is used for contributions and social-security matters.
For foreign nationals, the national health user number can be assigned when first accessing a public health unit.
Your procedure depends on your visa, legal basis, nationality, work, study or family situation.
Urgency makes scams more effective. Protect your access codes and verify who is asking for money or documents.
Do not give unknown people access to Finanças, Social Security Direct, AIMA or Digital Mobile Key credentials.
The official NIF and NISS requests are free. A private professional may charge for their own work, but that is not a government fee.
No legitimate intermediary can guarantee a favourable decision merely because money was paid.
