By sending a grant of probate to e-Boks, your next-of-kin can gain access to your documents. Access will be established electronically so it becomes possible for the next-of-kin to read, write and delete the mail in your archive through their own e-Boks.
Here's the form: Cancelling e-Boks in the event of death
After 15 months from the date of death, e-Boks reserves the right to delete your mailbox and its contents.