Final answer:
A company issues a purchase return document to document the approval of purchase returns. This document is used to record the details of the returned items and serves as proof of the approval.
Step-by-step explanation:
A company issues a purchase return document to document the approval of purchase returns. This document is used to record the details of the returned items, such as the reason for the return, the quantity, and the price. It serves as a proof of the approval and helps the company keep track of the returns.