I am a previous MN-er but have name-changed.
I let my bf have the keys to my flat a few months ago. After a row, I posted my keys to his flat back to him and asked for mine but they didn't materialise. We then had a reconciliation for a while, I asked for his flat keys back again as he still had possession of mine but no joy and it's gone tits up again. I've asked for my keys back for the last couple of weeks. He still refuses to return my keys to me despite umpteen texts, emails and now I've finally written a letter formally requesting them from him - I know it'll have little legal impact but morally it just might.
I've actually given up on him sending my keys back and am having the locks changed as I don't think he'd jib at just letting himself in if he took the fancy to but I still need/want the keys to return to the landlord (if/when) I leave my flat. AIBU? They're not his keys and were loaned to him in good faith. Never again!!