I usually have problems (In a work environment) of lending a book out, and then the person I lend it to lends it to someone else who then...

In my worst example, I had 2 text books that I brought in for a student use, he leant them to another girl that came into the lab... I asked when my student was leaving to find out where the books were, and then when I was leaving the lab, I asked the girl who had them... who did the... wait, when I moved I brought them back in to give to you...

So then it turned out that once they were brought back in I wasn't around, and another girl borrowed one of the books and the staff scientist borrowed the other...

This is of course borrowing that took place for several months each set of people.