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What to do if I forgot my Social Security Number?

what to do if you forgot the Social Security Number
The Social Security Affiliation Number is essential for carrying out all our procedures. If you forgot it, we'll show you how to get it back again.

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Discover how to easily find your Affiliation Number on the Social Security website with our informative video tutorial. Your Affiliation Number is a key identifier for your Social Security records, and our step-by-step guide will walk you through the process of finding it online.

Whether you need it for official purposes or simply want to keep track of your Social Security information, our tutorial will help you retrieve your Affiliation Number in just a few clicks:

The Social Security Number (or “Número de Afiliación a la Seguridad Social”), although usually in the background, is none other than our second Identification Document. It is unique, never changes, and accredits our affiliation with the Social Security System. Below, we’ll show you the step-by-step procedure of how to find out your Social Security Number online.

What is the Social Security Number?

The Social Security Number is a basic identification document for any Spanish citizen that allows them to be identified in their employment relationships. It is used when they are provided with health assistance in the National Health System, and also when carrying out certain procedures with the Public Administration. The Social Security Number and the Social Security Affiliation Number are exactly the same.

That is why it is important to have it at hand and, if we do not know where it is, to keep in mind how can we ask the administration to remind us.

Find out what is your Social Security Number, step by step

In order to be able to consult online our Social Security Number (NAF) we simply have to access the following link of the Electronic Headquarters of Social Security.

In this section of the website, we will see a long list of available procedures. We will have to search and click on the procedure titled as Accreditation of a Social Security Number.

The drop-down menu that will be displayed will inform us about the four ways to access the procedure:

  • Digital Certificate
  • Username and password of the Social Security System
  • Cl@ve System
  • By SMS

This last method (SMS) is probably the most practical because we receive a text message with the information directly to our cellphones, but you can only use it if your mobile phone number is already registered in the Social Security database.

In all other cases, after identifying ourselves, the Electronic Headquarters of Social Security will allow us to see and consult immediately the accreditation of the Social Security identification document, or affiliation document in case of having carried out activities that involve falling under any Social Security Regime, in which the Social Security number will appear accompanied by our name and DNI number. The document can be downloaded in PDF format and/or printed.

If none of these methods work for you, you can always try to find it on payrolls, Social Security documents such as the Work History Report, medical prescriptions, health cards of the Public Health System, or by calling the Social Security Telephone Service.

Let’s talk!

We want to listen to you and know what your questions are about the procedures you have to carry out. Count on the advice of our experts to clarify all your doubts. 

In Entre Trámites we invite you to know about all our consultation services. Fill in our contact form and we will call you to help you as soon as possible, schedule your online consultation, or simply text our WhatsApp.

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