Taken care of, on an invoice stamp Crossword Clue

 The answer to the taken care of, on an invoice stamp crossword clue is PAID.

An invoice stamp is a rubber stamp that is used to indicate that an invoice has been paid. The stamp usually has the word "PAID" or a similar phrase on it.

Here are some other words that can be used on an invoice stamp:

RECEIVED

AUTHORIZED

APPROVED

VERIFIED

CHECKED

I hope this helps!