| Answer | Crossword Clue |
|---|---|
| BOXTOPS | Some proofs-of-purchase |
| BOXTOPS | Some proofs of purchase |
| RECEIPTS | Proofs-of-purchase |
| STUBS | Certain proofs of purchase |
| RCTS | Proofs of purchase: Abbr. |
| UPCS | Proofs of purchase, often: Abbr. |
| UPCS | Modern proofs-of-purchase, for short |
