Here are the possible solutions for checking out as a joint clue
Answer
Clue
Relevancy
casing
Clue
Checking out, as a joint
Definition
a protective outer covering
trickknee
Clue
It may require joint checking?
It may require joint checking
counterplotz
Clue
Passing out while checking out?
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.
