Number of Social Security Affiliation in Leganés (2026)
Verified on:
Cost
Free
Free procedure
Time at office
30 minutes at the appointment
Estimated time
Immediate online
Quick summary
How to obtain the Number of Social Security Affiliation (NAF) in Leganés. Free procedure, online or on-site at the General Treasury.
Required documents
-
DNI, NIE or passport
Valid original identity document.
0 €
Free procedure €0.00
€0.00
€0.00
: 2026
Step by step
- 1
Online Application (Recommended)
Go to official siteAccess with Cl@ve or digital certificate to the Social Security Electronic Office.
!Expert tip
"If you already have a Cl@ve, the process is immediate without leaving home."
- 2
On-site with prior appointment
Go to official siteRequest an appointment at the General Treasury of Social Security in Leganés.
!Expert tip
"Always bring your DNI or NIE original copy."
Offices and service points - Leganes
General Treasury of Social Security — Leganés
Monday to Friday: 09:00 - 14:00
Frequently asked questions
Is the NAF the same as the NIF?
No. The NAF (Number of Social Security Affiliation) is exclusive to Social Security and serves for contributions. The NIF is the fiscal identifier (your DNI or NIE). They are different documents.
When do I need the NAF?
When you start working, if you register as self-employed, or when you need to access Social Security benefits.
Official sources and useful links
This guide is for informational purposes only. Always check the official source for current information.