When you take the different steps to settle in Portugal, you must go to many state agencies. For example social security, taxes, etc. In the past, you had to provide many copies of your various documents, fortunately things have changed.
As of 2019, Portuguese administrations no longer take into account identity documents or passports. Only the non-resident citizen card or the European resident certificate are accepted, so it is essential to register for the SEF in Portugal.
In the interests of...