Here's how to block a bidder / buyer from bidding on your auction:
1. Login into your
ebay and go to your "My
ebay" page.
2. Go to My Account, then select "Site Preferences".
3. You can see Selling Preferences option, then Buyers Requirement, click Edit.
4. In the Buyer Requirements, you can see "buyer requirements exemption list" otion and click it.
5. To set up a list of bidders/buyers who will no longer be able to bid on, or purchase, your listings you can click "Add an
ebay member to my Blocked Bidder/Buyer List".
6. You can block up to 5000 User IDs. To block a member, enter the member's user ID and click Submit and to remove a bidder/buyer from your blocked list, just delete the User ID in the text box and click the Submit button.