A proof of purchase (usually in the form of your vendor’s invoice) is used to qualify your return for credit eligibility based upon the source of your products, as well as the nature (and conditions, if any) of your purchase.

In addition, short-dated and overstocked or slow-moving products that may be available for purchase on secondary markets at a discounted price are also specifically excluded from credi
t eligibility under most manufacturers’ return policies. Such purchases would be readily identifiable based upon your invoice.
Similarly, bulk returns of a single NDC, suggesting a speculative purchase made in anticipation of a price increase, may also trigger a manufacturer to require proof of purchase.
The proof of purchase validation is designed to ensure proper compliance with manufacturers return policy, and keep unqualified or questionable returns out of the reverse distribution credit process.
Now the next time you’re asked for a proof of purchase, you’ll know why.
Many happy returns…