The EPP server generates a new authorization code (aka auth code) if a domain name is updated with a new registrant-ID. This means that a code generated before the domain update is invalid and therefore cannot be used. A new code must be generated.
Updated 10 Apr, 2020
The Swedish Internet Foundation is an independent, business-driven and public-benefit organization. We work for an internet that contributes positively to people and society. We are responsible for the internet's Swedish top-level domain .se and manages the operation and administration of the top-level domain .nu. The revenue from our business finances a number of initiatives in order to enable people to use the internet in the best way, and to stimulate the sharing of knowledge and innovation with a focus on the internet.