In case you accidentally fulfill your order in your store, it is very easy to cancel the fulfillment of orders in your store.
How to cancel fulfillment of orders 
      Shopify 
      WooCommerce 
      Wix 
  
  
Cancel fulfillment of an order 
Login to Shopify Click on the order for which you want to cancel fulfillment. 
    On the order details page, click the Three-dot  icon and then click Cancel fulfillment . 
 
This order will be marked as 
Unfulfilled  on Shopify. You will see the order is also moved to the  
Awaiting order  tab on the Open Orders page. 
      
It may take some time for your order to be moved to the Awaiting order  tab. If you don’t see it in DSers for a long time, please manually sync the order 
 
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Cancel fulfillment of an order 
You can cancel Completed orders on WooCommerce for a single order or multiple orders at once.
Login to WooCommerce Click on the order for which you want to cancel fulfillment. 
 On the Edit Order  page, click on the Status  drop-down list. 
Select Processing  from the drop-down list and click on Update  from the Order actions . 
 
This order will be marked as 
Processing on WooCommerce . You will see the order is also moved to the 
Awaiting order  tab on the Open Orders page. 
  
Cancel fulfillment of orders in bulk 
WooCommerce also allows you to cancel the fulfillment of multiple orders at once.
Login to WooCommerce Select all the orders for which you want to cancel fulfillment. 
Click on Bulk actions . 
Select Change status to processing  and then click on Apply . 
 
 
Now, these orders are marked as 
Processing  on WooCommerce.You will see these orders are also moved to the 
Awaiting order  tab on the Open Orders page. 
  
  
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Cancel fulfillment of an order  
Login to Wix Click on the order for which you want to cancel the fulfillment. 
On the order details page, click on More Actions  to access the drop-down list and Select Mark as Unfulfilled . 
In the Pop-up , click Mark as Fulfilled  to verify. 
   
This order will be marked as 
Unfulfilled  on Wix. You will see the order is also moved to the 
Awaiting order  tab on the Open Orders page. 
      
   
If it doesn’t move to the Awaiting order  tab for a long time, please go to DSers  > Settings  > Synchronization  to manually sync the Wix order 
 
If you have any questions of this article, please click 
here  for help.         
 
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