Here is an easy way to find out if the address you are sending goods or payment to is a genuine address.
It can be worrying sending things to an unconfirmed address, but there is a way to check if the address exists (available for the United Kingdom only).
Visit Royalmail.com and navigate to the 'Postcode Finder Page'
You can use this page to get a postcode for an address!
But if you click on the 'Address Finder Page', you can check if an address exists in the United Kingdom
I hope this helps you safely sell on eBay, please rate it below.