Urgent Help needed - Unprocessible Entity Error

Dear Community,

Urgent help needed. We are listing products from Various sellers on our platform. Users place order on our platform and we in turn use the Shopify place order APIs to place orders on Sellers shops on behalf of these users.

While placing the orders, we are sometimes getting the error message - ‘un processible entity’ and the order is marked failed as there was an error and Shopify did not return us any order ID. But, one of the Shopify seller is getting confirmed orders for these failed requests as well. So, we are marking the order failed on our platform and same is reflected on UI to the user that his/her order is failed. But after few days, the user is receiving the shipment as the order was successfully placed on Shopify store.

Please help us how to debug what is the root cause of this mismatch. Thank you so much in advance :slightly_smiling_face:

Adding more to above query -
In any case if we do not have the order ID of the order we placed at Shopify which we get from Shopify Place Order API response, how do we check the order status? Is there any alternate solution to this?