The default sender address of your eBay Delivery account is taken from the your eBay account registration address. In fact when you first ship an item using eBay Delivery, your eBay registration address is automatically set up as sender address.
⚠️EBAY ACCOUNT & EBAY DELIVERY SENDER ADDRESS
Your eBay account (https://www.ebay.co.uk) and the eBay Delivery account (https://delivery.ebay.co.uk/) are 2 different platforms connected to each other for the shipping part. This allows effortless importing of your items sold on eBay into eBay delivery. However they still remain 2 different platforms.
eBay Delivery takes the registration address from your eBay account. Your registration address on your eBay account, will be your default addresses on eBay Delivery as well. eBay Delivery does not take primary postage address or the return address from your eBay account. So if you have a primary postage address different from the registration address, eBay delivery will only take the registration address as the default sender address.
On eBay Delivery there is a functionality called pre-set addresses. However this functionality does not work on eBay Delivery. If you have added different default address on eBay Delivery (by going to the Your pre-set addresses https://delivery.ebay.co.uk/private/settings/warehouses) , the eBay registration address will always prevail. In such a case, every time you purchase a shipment on eBay delivery, you will have to manually change the sender address of the shipments.
⚠️ CAN I CHANGE THE DEFAULT SENDER ADDRESS ON EBAY DELIVERY
If you wish to have the sender address changed on ebay delivery you should amend the registration address from your ebay account by going to My eBay - My Account - Addresses.