Obtain the FNMT Digital Certificate in Castellón de la Plana (2026)
Cost
Free
Free
Time at office
15 minutes (only identity validation)
Estimated time
Same day
Quick summary
How to obtain the citizen digital certificate (FNMT-RCM) in Castellón de la Plana. Needed for online procedures with administration. Free.
Required documents
-
Valid DNI or NIE
Original identification document to present during the validation.
-
Computer with compatible browser
Firefox or Internet Explorer for downloading the certificate (recommended Firefox).
: 2026
Step by step
- 1
Request the online application code
Go to official siteAccess cert.fnmt.es and enter your NIF to get an application code that will be sent by email.
!Expert tip
"Use the same browser throughout the process (application, validation, and download)."
- 2
Validate your identity in person
Go to a registration office (AEAT, Social Security or City Hall) in Castellón de la Plana with your DNI original and the application code.
!Expert tip
"You can validate at an AEAT office or Social Security Treasury without prior appointment in many cases."
- 3
Download the certificate
Go to official siteWithin hours (or the next day), return to cert.fnmt.es with the same browser and download the certificate.
!Expert tip
"Make a secure backup of the certificate (.p12) with a strong password."
Offices and service points - Castellon
FNMT Registration Offices — Castellón de la Plana (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.