If you need to update the customer's data once they have made their return, to send notifications to a new phone number or email address, you can do so from the Merchant Dashboard.

1. Find the order on the home page and select the transaction.
    
2. Click on the drop-down menu that you will find on the right side of the screen, on “customer details” and select “EDIT CUSTOMER DETAILS”. 
   
   
    
3. Modify the data and click "save". 

Once updated, you can forward the return instructions to the new contact - here's a brief guide.