A common thing in many movies is for something to be stored in a locker at a bus station or train station. ISTR at least a couple of movies where the Big Clue or the MacGuffin or whatever had been in the locker for years.
In reality, how long can someone store something in a locker? Do authorities periodically clean them out? Or, since they don’t know when someone may have used the locker (i.e., they wouldn’t know if something had been stored in a locker for years, or if the locker had turned over twice a day), do they just leave them? Presumably, they collect money from the lockboxes. That might give them a clue that a locker was being ‘abused’. Which leads me to wonder whether they can they get the money out without opening the locker?