Here are the possible solutions for need for checking people out clue
Answer
Clue
Relevancy
register
Clue
Need for checking people out
Definition
to record officially
counterplotz
Clue
Passing out while checking out?
kiter
Clue
One whose checks need checking
Definition
one that kites, obtains money fraudulently
barcodes
Clue
They're scanned when checking out
Definition
BARCODE, an arrangement, readable by computer, of thick and thin parallel lines, e.g. printed on, and giving coded details of, goods at a point of sale, library books, etc.