When a buyer bids on an item and then asks for ebay to remove his/her bid.

When a bid is placed in mistake, the auctioneer at his/her discretion may cancel that bid and revert to the next highest bid.

Bid retractions or cancellations are permitted only under extraordinary circumstances. Once your bid is placed, you have an obligation to complete the transaction if you win. Keep your User name and password confidential, so that other users cannot access your account. If you believe you have an extraordinary situation (for example, you typed an extra digit and bid 1000 instead of 100), please contact customer support.

The legitimate cancellation of a bid on an item by a buyer during an online auction.

When a buyer cancels his own bid. On most auction sites, buyers must show due cause for retracting their bid, and bid retractions are often not permitted during the final minutes of an auction

The feature of eBay that acts as a safety net for buyers, ensuring that if they make a mistake or if the seller does not act within the rules, the bid they placed on an item, can, IN SPECIFIC CIRCUMSTANCES, be retracted.

A cancellation of the bid by the seller.

Remember that bidding is a binding contract for you as the buyer if you bid and win an item. Generally speaking for that reason retracting a bid is simply not allowed. However there may be times when you entered the wrong bid amount or the item's description changed significantly and you cannot get a hold of the seller. In these cases, just follow the instructions as outlined in the Bidder's FAQ (under Retracting a Bid).

The legitimate retraction or cancellation of a bid on an item by a bidder during an auction. A confirmed bid placed on a CSTV Online Auctions listing cannot be retracted except under exceptional circumstances.

The legitimate retraction of a bid on an item by a bidder during an auction. Bid Rigging: The unlawful practice whereby two or more people agree not to bid against one another so as to deflate value.

A reasonable and legitimate retraction or cancellation of a bid, during an auction, by a bidder. Bidz.com listings with a confirmed bid cannot be retracted except under extraordinary conditions.

the withdrawal of a bid (bid retractions are rarely allowed on eBay)

The legitimate retraction or cancellation of a bid on an item by a bidder during an auction. A confirmed bid placed on an The Free Auction listing cannot be retracted except under exceptional circumstances.

A cancellation of a placed bid by the bidder. Members should exercise this option only in unusual circumstances.

The cancellation of a bid by a buyer during an auction-style listing. In general, a buyer cannot retract a bid once it is placed during an auction-style listing, so please bid carefully. A retraction may be allowed under special circumstances. For example, if buyers accidentally enter the wrong bid amount (entering $99.50 rather than $9.95), they may retract it and enter the right bid amount as long as they do so immediately. Make sure you're aware of other rules and restrictions surrounding the retraction of bids. For more information, see Bid Retractions.

A temporary cancellation of a bid during an auction to be replaced by another bid. There are very few situations in which a retraction is permitted. One reason for retracting a bid is entering a wrong bid amount that is substantially different than intended. For example, placing a bid of $10,000 instead of $1,000 would be an acceptable reason for a bid retraction. A bid retraction must be done immediately after entering the bid, so please be very careful, and review the bid confirmation closely. Please see the Terms and Conditions for more information.