This guide concerns domain names with the .se extension.

Introduction

• The .se domains are managed by Internetstiftelsen i Sverige (IIS), the official organization that governs domain names in Sweden.
• They were introduced in 1986, and it was during the 2000s that they experienced a surge in popularity because their suffix could be used for words like "clo.se", "sen.se", etc.

Change the owner of a .se domain

To change the owner of a .se domain, the procedure defined by the IIS requires filling out a specific form.

In the form, the IIS IDNO (ID Number) field is a key requirement:

• For Swedish citizens: enter the social security number (Personnummer), e.g. 800101-1234,
• For Swedish companies: use the company registration number (Organisationsnummer), e.g. 556123-4567,
• For foreign citizens or non-Swedish companies: enter an identification number, such as a passport number, ID card, or equivalent for your country.

This is used to authenticate the owner and prevent disputes or fraudulent use of the domain. The change may take a few days, depending on how quickly the documents are verified.