If you are going to publish a periodical, you must have a certificate of publication.
Here you can apply for a certificate of publication and get a guide on how to do it.
Renew, change or revoke your certificate of publication when you already have one.
From PRV to the Media Authority (Mediemyndigheten)
As of January 1, 2025, all management of certificates of publication for periodicals will be transferred from PRV to the Media Authority.