Multiple resolution typically involves two (or more) publishers involved in a co-hosting agreement. For the purposes of multiple resolution, the primary depositor is the content owner, meaning they represent the organization that holds copyright for the content or is otherwise known as the publisher. Multiple resolution DOIs are created with / owned by the primary depositor's prefix. The secondary depositor co-hosts content with the primary depositor - they have been authorized by the content owner to also host content and assign additional URL to DOIs. We'll always defer to the primary depositor's instructions regarding changes to a metadata record including all assigned URLs.
Before depositing, the primary or secondary depositor must notify us of the intention to deposit multiple resolution DOIs, and all titles and prefixes involved. The secondary depositor may coordinate multiple resolution activity with permission from the primary depositor - this can be an email to firstname.lastname@example.org stating "XYZ Publishing has permission to coordinate multiple resolution activity on our behalf for titles (...)"
Enabling a deposit account for multiple resolution
The Multiple Resolution process only permits URL data to be deposited by secondary depositors . All other metadata can only be deposited (and updated) by the primary depositor. The primary depositor will be able to perform all multiple resolution functions using their existing Crossref system account. The secondary depositor will be assigned a new system account to be used for multiple resolution deposits only.