When you are checking in items, please use the Claims Missing Piece procedure. When you find an empty case on the shelf or at the Circ Desk, please mark the item with a circulation status of Missing in Polaris. Then put a note on the case with the date and your initials. Place the empty case in the box under the Incomplete AV shelf. We will leave cases there for three weeks and see if the disc turns up. After three weeks, we will put it to replacement.