Updated on May 30, 2024 Full error name: “Please specify a valid return policy. ErrorCode: 21916328“ Cause This error indicates that you need to update the return policy you’ve chosen for your listings. Solution Go to the Channels tab.Click on eBay settings.Scroll down to the “Business Policies” section.Make sure that the “Return policy” you picked is updated.If not, update your policy in eBay directly – check this article to guide you.Once done, save changes and retry the publication.