Amazon asking for receipts on a sold out listing

Hi

I sold all units of my 1st product and now Amazon is asking for invoice/receipt. I have lost the receipt. What can I do? I got the product from a retail shop.

Thank you

In this case, I would recommend reaching out to the retail shop from which you purchased the product. They should be able to provide you with a duplicate copy of the invoice or receipt. If you explain your situation to them, they will likely understand and assist you accordingly.