I live in a ‘unit’ it’s called with locked coded gates and postboxes, we have not long moved in and waiting for the agency to provide us a letter box key. It wasn’t a worry as any parcels usually go to the post office as they don’t fit.
Last week a delivery of earrings were ‘delivered’ and I couldn’t find them so reported it to the company and waiting hear back.
Now a dress was delivered and photo provided by post to show photo of the letter boxes and it’s gone! They are saying nothing they can do when I called.
AIBU to put a note on my letter box which someone is clearly regularly visiting? I was just going to kindly ask for the items to be returned so we can all live in a safe environment. I am quite upset as I never steal an it makes me feel unsafe in my unit when we live in quite a safe area.
My partner suggested a fake parcel with the note inside and seeing if it’s taken lol 
I have now lost quite abit of money on the expensive dress and silver earrings.