NIE + certificat de înregistrare UE
The NIE (Número de Identificación de Extranjero) is a fundamental tax identification number required for all financial and legal activities in Spain. As an EU citizen, your next step after NIE is obtaining the EU registration certificate (Certificado de Registro de Ciudadadano de la Unión), which confirms your right to reside in Spain for more than three months. This process is mandatory for long-term residency.




