What does “fannish next of kin” mean?

Archive of Our Own allows users to designate someone to manage your fanworks in the event that you die or become incapacitated. Open Doors can only honor requests for memorial archives by a deceased creator’s next of kin or fannish next of kin. For more information on fannish next of kin and how to designate someone as your fannish next of kin, please check out the Archive’s FAQ.