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How to Obtain the Social Security Registration Number in San Sebastian (2026)

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Cost

Free

Free service

Time at office

30 minutes at the appointment

Estimated time

Immediate online

Quick summary

Instructions on how to obtain your Social Security Registration Number (NAF) in San Sebastian. Free service, available online or at the General Treasury Office.

Required documents

  • DNI, NIE or passport

    Valid original identification document.

0 €
Free service €0.00
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: 2026

Step by step

  • 1

    Online Application (Recommended)

    Go to official site

    Log in to the Social Security Electronic Office with Cl@ve or digital certificate.

    !

    Expert tip

    "If you have a Cl@ve, the process is immediate and can be done from home."

  • 2

    In Person with Prior Appointment

    Go to official site

    Schedule an appointment at the General Treasury of Social Security in San Sebastian.

    !

    Expert tip

    "Always bring your DNI or NIE original document."

Offices and service points - San Sebastian

General Treasury of Social Security — San Sebastian

Monday to Friday: 09:00 - 14:00

Frequently asked questions

Is the NAF the same as the NIF?
No. The NAF (Registration Number) is unique to Social Security and used for contributions. The NIF is the tax identification number (your DNI or NIE). They are different documents.
When do I need the NAF?
When you start working, when becoming self-employed, or when accessing Social Security benefits.

Official sources and useful links

This guide is for informational purposes only. Always check the official source for current information.