The reason why this or similar orders got rejected by Amazon
It seems that this order has a pending payment inside Shopify, as a result, our app didn't forward it to Amazon FBA for its fulfillment.
- Go to the Order Log page
- In the Order ID field, enter the Order ID of this rejected order, and hit the Search button
- In the action tab, click on the Re-submit button
- Upon, successful re-submission, you will see the status of this order changed to Accepted by Amazon