If the Oberlo Chrome Extension stops filling in customer’s shipping information on the AliExpress Checkout page and you are asked to fill in the right email address, this means that you are placing the order as a guest.
Do not fill in your customer's email address in the AliExpress Checkout form as in this situation, AliExpress will send order confirmation emails to your customer.
When you dropship products using Oberlo, you need to create an AliExpress buyer's account and place orders using it. If you have an AliExpress account already used for personal purchases, we still recommend creating a separate one for dropshipping with Oberlo.
Once you create an AliExpress account, go back to Oberlo to process the order. Make sure the AliExpress shopping cart is empty before you click the orange "Order Product" button in Oberlo.