Related Clues:
- Proof of ownership
- Ticket stub, e.g.
- It usually comes with a new shirt
- Proof of purchase
- Business attire at Sotheby's?
- Register output
- Buying evidence
- Return requirement?
- There's no returning without it
- Return requirement
- Acknowledgement
- Slip on a new piece of clothing?
- Exchange requirement
- Expense report attachment
- Receipt