A. Ensure that your invoices are formatted correctly according to Amazon's requirements. Check the invoice template you are using and make sure it includes all necessary information such as seller name, address, order number, and item details. You can find Amazon's invoice requirements in their seller central help section.

B. If the invoice format is correct but still not accepted, try exporting the invoice as a PDF and then uploading it to Amazon. Sometimes, file format issues can cause acceptance problems.