The NIE is your foreigner identification number. The TIE is a photo identity card held by many non-EU residents. The green EU certificate proves an EU citizen has registered as resident in Spain and shows their NIE. They are connected — but they are not interchangeable. Confusing them is how people book the wrong appointment.
Why people call the green certificate a “green NIE”
The EU registration certificate is printed on green paper or issued in a small green format and includes the holder’s NIE. Over time, “green NIE” became common shorthand.
The shorthand is understandable but unhelpful. It makes people think they are applying only for a number when the officer is actually assessing EU residence conditions under the certificado de registro de ciudadano de la UE process (normally form EX-18).
What an NIE proves
An NIE proves that the Spanish administration has assigned you an identifying number. According to the Policía Nacional NIE assignment guidance, a standalone number is for foreigners who relate to Spain for economic, professional or social reasons. It does not automatically prove where you live, that you are tax resident, that you can work or that you have completed EU registration.
A non-resident property buyer and an EU employee living in Madrid can have NIEs for entirely different reasons. For the step-by-step of requesting a number or booking the matching route, see How to get an NIE in Spain.
What a TIE proves
A TIE is a physical foreigner identity card. It contains a photograph, the NIE and details linked to the holder’s residence authorisation.
It is mainly relevant to non-EU nationals. The card’s validity and conditions are connected to the underlying immigration status. Losing the card does not erase the NIE, but the card must be replaced. Related extranjería request models (including card-related forms in the EX-17 family) are published with other modelos generales.
What the EU registration certificate proves
The certificate records that an EU, EEA or Swiss citizen has registered as resident in Spain. The application is normally made within three months of entry when the stay will exceed three months.
The process uses EX-18 and requires evidence matching the applicant’s category: worker, self-employed person, student or economically inactive person — again detailed on the official EU registration procedure page. Planning the whole arrival sequence? See Moving to Spain as an EU citizen.
NIE vs TIE vs green certificate at a glance
| Document | What it is | Who it is for | What it proves | Usual path |
|---|---|---|---|---|
NIE | Identification number | Anyone assigned a foreigner ID number (standalone or via another process) | That you have an admin ID — not residence or work rights by itself | Often EX-15 for standalone assignment |
TIE | Photo identity card | Many non-EU residents with a Spanish residence authorisation | Identity + NIE + details tied to that authorisation | After immigration approval (card forms often in the EX-17 family) |
Green EU certificate | EU residence registration certificate | EU/EEA/Swiss citizens staying more than three months | Registered EU residence; includes the holder’s NIE | EX-18 |
Which one do you need?
| Situation | What you commonly need |
|---|---|
Buying a property as a non-resident | Standalone NIE |
EU citizen moving to Spain for more than three months | EU registration certificate (includes an NIE) |
Non-EU citizen with a Spanish residence authorisation | TIE after the relevant immigration approval |
Non-EU family member of an EU citizen | Residence card under the family-member process — not the EU citizen’s green certificate |
The booking mistake to avoid
Do not select an appointment simply because the label includes NIE. Check the form and the outcome. EX-15 is associated with a standalone number; EX-18 is the EU registration process. Use the official cita previa extranjería directory and match the procedure to the document you actually need.
A perfectly prepared file at the wrong appointment is still the wrong application. If you already know you need a standalone NIE or EU registration, follow the route checklist in How to get an NIE in Spain.
Why the distinction matters after the appointment
Banks, employers, landlords and even service providers sometimes use the terms loosely. Ask what evidence they truly need: the number, proof of residence, a photo card, proof of address or proof of the right to work.
That one question prevents a surprising amount of unnecessary paperwork.
What sttld changes
Most explainers stop at definitions. The real job is matching the document to your situation, then sequencing the right form and appointment so you do not rebuild the file from scratch.
sttld is being built to ask the minimum questions needed to classify your case, prepare the right forms from one profile and show you exactly what happens next.
Sources
- Asignación de NIE a instancia de interesado (Policía Nacional)
- Certificado de registro de ciudadano de la UE (Policía Nacional)
- Modelos generales (Ministerio de Inclusión)
- Cita previa extranjería
FAQ
What is the difference between an NIE, a TIE and the green certificate?
The NIE is a foreigner identification number. The TIE is a photo identity card held by many non-EU residents and includes the NIE. The green EU registration certificate proves an EU citizen has registered as resident in Spain and also shows their NIE. They are connected but not interchangeable.
Why do people call the green certificate a green NIE?
The EU registration certificate is printed on green paper or issued in a small green format and includes the holder’s NIE, so “green NIE” became common shorthand. That shorthand is misleading because the appointment is assessing EU residence conditions, not only assigning a number.
Which do I need — NIE, TIE or green certificate?
A non-resident property buyer commonly needs a standalone NIE. An EU citizen staying more than three months commonly needs the green EU registration certificate, which includes an NIE. A non-EU citizen with Spanish residence authorisation commonly needs a TIE after immigration approval. Non-EU family members of EU citizens follow the family-member residence card process, not the EU citizen’s green certificate.
What booking mistake should I avoid for NIE vs TIE vs green certificate?
Do not select an appointment only because the label includes NIE. Match the form and outcome: EX-15 is associated with a standalone number; EX-18 is EU registration. A perfect file at the wrong appointment is still the wrong application.