Among the administrative procedures to be carried out during an expatriation in Spain, obtaining the NIE is one of the most important. Indeed, the Foreign Identity Number (NIE) is a unique and personal identification number that is mandatory when registering as a foreign resident living in Spain. Without this NIE number it will be impossible for you to rent an apartment, open a bank account, find a job or even take out subscriptions. In short, the NIE is a mandatory step as an expat in Spain. How do I get it ? What documents are needed ? I am Lisbob, the expats assistant, and I am going to tell you all about the NIE in Spain.