What does the product status Pending Return to Vendor mean?
Pending Return to Vendor means that you have an open (unposted) supplier invoice with a negative quantity of the product. This negative quantity is flagged as Pending Return to Vendor until the invoice is posted.
Often a store will create a supplier invoice with a negative product quantity when a product is being returned to the supplier. However, the store will not post the invoice until the credit actually appears on a subsequent supplier invoice.
Use the Supplier Invoice Filter to locate the supplier invoice in question. You can look through unposted invoices only by selecting NO under the Posted option.