[rand_r]

> to see if the serial numbers are out of circulation.

Cash cannot be invalidated like this. It would ruin the value of all cash since you could no longer trust cash from anyone. Only damaged notes are taken out and replaced by the government.

[Bratmon]

Specifically invalidating serial numbers of cash used in a crime is a very common process.

[rand_r]

This is something you see in movies. Cash is by nature not traceable, so invalidating notes after issue would make it impossible to trust any cash transaction.