Suburban Mystery

Something funny is going on with our letter box. When we moved in we made a little sign with our names on it and stuck it on the letterbox, along with a "no junk mail" sign. I don't really remember what happened with the first name tag, but it fell off after about a year and a half and we made another one to replace it. About a month after we put it up, someone peeled off the second name tag (all these signs are paper stuck on with sticky tape) and re-stuck it onto the top left corner of the letter box. The sticky tape clearly didn't appreciate being made to unstick and restick, but it clung pathetically there for some number of months and we didn't give it much thought. At the same time as the second tag was moved, our "no junk mail" sign (which was in german) was taken away and replaced with a french one, as were most of the other non-matching junk mail stickers on our neighbours' letterboxes.

The other week we got no mail. Eventually we realised that this was because the name tag had fallen off the letter box (and there are no apartment numbers here - if your name isn't on the letter box you don't get any mail) so we made another tag and stuck it on. Two days later we saw that someone had unstuck the third name tag and restuck it in the top left corner again. There are 6 letter boxes for our building, and of those 5 have their name tags in the top left corner, and 4 have matching "no junk mail" stickers (another one has an unmatching one and the last has none). No one has ever said anything to us about the importance of name tag placement.

Who is moving our stickers? And why? I am extremely sceptical that it would be our landlords, because they're not really concerned with anything much (I'm sure that if the appearance of the letter boxes was at the forefront of their daily thoughts, they wouldn't have painted them hideous lime green nor let us make crappy paper-and-sticky-tape name tags instead of buying those matching metal name plates that seem to be the norm here. Plus maybe they'd be more concerned about fixing our crumbling walls and they might have made us pay a bond when we moved in. I really like their lack of concern). Is it the people from the post office? Does the misalignment of our name tag cause them so much difficulty in their work? Is it so hard (in this bilingual canton) to read "no junk mail" in german as well as in french? And why didn't whoever moved our name tag move the one remaining misaligned name tag on our building's collection of letter boxes as well?

Strange.