What is the “Número de Soporte”?
The “Número de Soporte” is a unique reference number used in Spain, mainly for identification purposes in various administrative procedures, particularly with the Cl@ve system and for declaración de la renta.
Where to Find It
Depending on your type of document, you can find the “Número de Soporte” in different places:
- EU NIE CARD – Certificado de Registro de Ciudadano de la Unión:
- On the back of the little green NIE card (e.g., 7654321)
- On the upper right corner if you still have a green A4 document
!!! To introduce this number on official web pages, add the letter
“C” in front of the number and if it has less than 8 digits, add leading zeros (e.g., C07654321).
- TIE CARD – Tarjeta de Extranjero (For NON-EU citizens):
- On the front upper right corner, preceded by the letter “E” (e.g., E87654321).
! If the number has less than 8 digits, it is necessary to add zeros between “E” and the rest of the numbers.
- DNI (for Spanish citizens):
- On the front of the card (e.g., ABC654321).
Why You Need It
The “Número de Soporte” is necessary for:
- Cl@ve System Registration: Used for secure online identification in Spanish administrative processes.
- Accessing Government Services: Required when applying for various public services.
- Verification and Identification: Needed in numerous official procedures to verify your identity.
IMPORTANT:
For more details about Numero de soporte, visit the Agencia Tributaria website.



