How to obtain the FNMT digital certificate in Leganes (2026)
Cost
Free
Free of charge
Time at office
15 minutes (just for authentication)
Estimated time
Same day
Quick summary
Instructions on how to get the citizen's digital certificate (FNMT-RCM) in Leganes. Required for online transactions with the administration. Free of charge.
Required documents
-
Valid DNI or NIE
Original identity document to present at the authentication.
-
Computer with compatible browser
Firefox or Internet Explorer for downloading the certificate (recommended Firefox).
: 2026
Step by step
- 1
Request online application code
Go to official siteAccess cert.fnmt.es and enter your NIF to obtain an application code that will be sent by email.
!Expert tip
"Use the same browser throughout the process (application, authentication, and download)."
- 2
Authenticate your identity in person
Go to a registration office (AEAT, TGSS, or City Hall) in Leganes with your original DNI and the application code.
!Expert tip
"You can authenticate at AEAT offices or at the Social Security Treasury; no appointment is usually required."
- 3
Download the certificate
Go to official siteWithin the following hours (or the next day), return to cert.fnmt.es with the same browser and download the certificate.
!Expert tip
"Make a secure copy of the certificate (.p12) with a strong password."
Offices and service points - Leganes
FNMT Registration Offices — Leganes (AEAT, TGSS, City Hall)
Frequently asked questions
What is the purpose of the digital certificate?
Does the certificate expire?
Official sources and useful links
This guide is for informational purposes only. Always check the official source for current information.