What is DNI in Spain?
The DNI (Documento Nacional de Identidad) is Spain's national identity document card for Spanish citizens. It proves who you are, your personal details, and your Spanish nationality, and it is the one document that does all of that on its own.
It is issued by the Ministry of the Interior through the national police (Dirección General de la Policía), and it is a public, official, personal document that cannot be transferred to anyone else. Spanish law treats it as full proof of identity, so public bodies and private companies have to accept it for that purpose.
Two more things sit inside it. It is a smart card with a chip, which means it doubles as a tool for electronic identificationand for signing documents electronically, online or in person. That second life of the DNI, the digital one, is the part that occasionally matters to foreigners, and we come back to it below.
Every Spanish national has the right to one, and it becomes compulsory at age 14 for Spanish citizens living in Spain. It is also required for Spanish nationals over 14 who live abroad and then move to Spain for six months or more. If that does not describe you, you are in the right place for the rest of this guide.
What is the validity of a DNI?
A DNI's validity depends on the holder's age, running from 2 years for small children up to long-term validity for people over 70. The bands set by the Ministry of the Interior are:
| Age at issue or renewal | How long the DNI is valid |
|---|---|
| Under 5 | 2 years |
| 5 to 29 | 5 years |
| 30 to 69 | 10 years |
| 70 and over | More than 10 years, with an end date still printed on the card |
So the often-repeated line that a DNI "never expires" after 70 is not quite right. It is a long fixed validity with a date on it, not a card without an expiry. There is also an exceptional 1-year validity in odd cases, for example when fingerprints cannot be taken temporarily or a required document is missing.
One detail that trips people up: the electronic certificates inside the chip are valid for only 2 years, even when the physical card is good for ten. They can be renewed without issuing a new card. That gap between "the card is valid" and "the chip's certificates are valid" is exactly the kind of thing nobody mentions until your digital signature stops working.
















