For Bidders: If you placed a bid and need it removed, you will need to contact the Auction Organizer to remove the bid. From the Auction page, click Help at the top and select "Contact Auction Organizer".
For Auction Admins:
If there's a bid placed by accident, you can retract that bid.
From inside your admin area, open the bid history for the item and you will see a red “x” next to it. By clicking the x it will remove that bid.
1) Click "Auctions" on the far left.
2) Click on "Manage Auctions".
3) Click on the Name of your auction.
4) Click on "Items".
5) Click on the Blue Number “Bids”
6) Click the Red x to remove bid.