Will the particular Naira note you spend ever come back to you?

That was a question that troubled me as a boy & so I wrote my initials on every note I used to be sure it is the same notes when I received them.

As I paid for fuel this evening & saw a signed note among the bunch, I just smiled, could this chap be trying to solve the same puzzling question?

Mind you, none of the signed notes ever came back.