How do we transfer ownership

The owner of my board wishes to transfer ownership of our long established board over to me. He did some searching here and is under the impression he can't unless he deletes all his posts on our board first, something which is not acceptable to any of us.

Can you clarify the procedure?

This should explain all.

https://help.forumotion.com/t81878-recovery-or-change-founder-of-an-account

Hmmmm....it does say he has to delete all posts that he's made. But he wishes to stay a member of our board, just no longer own it or be an admin.

In any case, deleting all of his posts would leave huge holes in our threads; he's been an active poster and general member as well since its inception.

Is there no other way?

Nopes, those are the only ways mentioned in the thread.