If you are joining an EU citizen spouse in Portugal under Article 15, almost everything rests on one document being right before you start. The EU citizen's registration certificate. I have been on both sides of this. I went through Article 15 as the non EU spouse when we first came in 2022, and I am now an EU citizen myself. This is the honest version of how the process actually fits together, what to check at each step, and the mistake we made that cost us months, so that you do not make the same one.
I want this to be the page I could not find when we needed it. Not a list of terms, but the shape of the thing, in the order it actually happens, with the parts that trip people up marked out. I will tell you what I know from the inside, and I will be honest about where the rules have moved since, because they have.
The two documents, and why people confuse them
There are two separate things, for two separate people, and almost every difficulty I have seen begins with treating them as one.
The first is the CRUE, the Certificado de Registo de Cidadão da União Europeia. This belongs to the EU citizen in the family. My husband is the EU one. It is his certificate, in his name, and it confirms that he is legally resident in Portugal.
The second is the residence card under Article 15. This belongs to the non EU family member. When we first came in 2022, that was me. I went through the whole Article 15 route as the non EU spouse, resting my application on my husband's certificate. I have since become an EU citizen myself, so I have now stood on both sides of this process, and that is the vantage point I am writing from.
That order is the whole thing. You cannot start the second until the first is done properly. I have watched people lose weeks by going to the immigration authority first, before the EU citizen's registration was finished, and being sent away to do it in the right order.
The order it actually happens in
Here is the sequence, plainly, because nobody laid it out for me like this.
First, the EU citizen registers at the local Câmara Municipal, the town hall, for the area where you live. Not at the immigration authority. At the town hall. This is where the CRUE is issued, usually the same day, and it is inexpensive, around 15 to 18 euros for an adult. You are meant to do this after three months of residence and within thirty days of passing that point.
Second, once the EU citizen holds the CRUE, the non EU family member applies to AIMA, the immigration agency, for the Article 15 residence card. The application is meant to go in within thirty days of the family member completing three months in Portugal. The fee for the card is small, around 33 euros, paid once when it is issued.
Third, the card is processed. You are generally allowed to stay and to work while you wait for it, and the card itself, when it comes, is usually valid for five years.
That is the clean version. Ours was not clean, and the reason is the thing I most want you to take from this.
The mistake that cost us months
My husband had registered before I arrived. The town hall had given him a certificate. We thought of it as a single object. Yes or no. He had it. We were fine.
A lawyer, weeks in, asked to see it. She looked at the dates. His certificate was a short term one, and for my application, joining him as his spouse, it needed to be the longer version. They can look almost identical on the page. The difference is the duration printed on it, which is the easiest thing in the world to miss when you have just moved countries.
We had thought of the certificate the way you think of a passport. Either you have one or you do not. In fact it is more like a season ticket. The wrong one will not get you through the door.
He went back and applied for the correct version. It was granted, but it took time, and time, when you have moved your life on the basis of a route you thought was open, is the resource that runs out fastest. The whole process paused around a clerical detail that nobody had thought to mention.
I should be straight with you here. The system has changed since then. The old authority, SEF, became AIMA. Today the CRUE is issued as a five year certificate as standard, so the exact trap we fell into is less likely now than it was for us. But the lesson underneath it has not moved at all. Do not assume the document in the drawer is the right one. Read the dates on it before you build anything on top of it.
The small things that go wrong, that nobody warns you about
These are the details I have collected, mine and other people's, that do not appear on the official pages.
Do the town hall step fully before you touch AIMA. Going to the immigration authority before the EU citizen's registration is finished does not move you forward. It sends you back.
When you request the AIMA appointment online, the certificate number they want is the EU family member's CRUE number, not the non EU applicant's. People put in the wrong one and the request fails.
Keep the online form in Portuguese rather than switching it to English. The English version is where errors creep in.
Name your uploaded files simply, without accents or special characters, before you attach them. Files with odd characters in the name are a quiet, common reason an upload is rejected.
Proof of address is the document that takes longest to assemble, so start it early. Depending on your situation it can mean a rental contract, rent receipts, a certificate from the Junta de Freguesia, or a signed declaration, and gathering it is rarely the ten minute job you expect.
What it leads to, if you get the base right
The reason all of this matters beyond the first year is that everything stacks on it. The Article 15 card is generally a five year card. After five continuous years of legal residence you can apply for permanent residence. Citizenship follows under the current rules, which were reformed in 2026. Every one of those later doors assumes the first certificate was correct and the clock started clean. A wrong document at the base does not just delay a form. It delays the start of everything that comes after.
That is why I would rather you spend an extra afternoon on the certificate now than lose the months we lost.
One note, and I mean it. The residency system in Portugal changed from SEF to AIMA, the certificates, fees and forms have moved, and the citizenship timelines were reformed in 2026. The figures and steps above were correct as I understood them in 2026. Confirm the current position with AIMA, your local Câmara Municipal, or a lawyer before you act on it. On the experience of being inside this, I will tell you what I know. On today's exact forms and fees, check.
We lived this the hard way, and it is one chapter of a much longer road. The whole of it, from the first dream of Portugal through the paperwork to the year settling into place, is in the book: Moving to Portugal: The Honest Version. And if you want the full story of the certificate, the three lawyers, and how the route took four years instead of three, it is here.