TL;DR
- We could not cite an official help article that documents a Hidden inbox or an Unhide button.
- Users who hid a thread describe the same recovery: open the person’s profile and message them. The earlier messages come back with the thread. There is no separate list of hidden chats.
- If you do not remember the username, that path stops. OnlyFans does not publish a search of hidden chats.
- A message the other person hid on their side is their screen. You cannot unhide it for them.
- If the thread was a purchase and it is simply gone, email support@onlyfans.com from the account email. Do not pay a third-party “recovery” tool.