Ordinarily, the seller will accept or reject bidders or offers manually, but there are some cases in which they’re dealt with automatically.
Normal public auction bidder applications and Buy It Now bids and are automatically rejected by Flippa if the seller takes no action for 72 hours after the bids are made.
When a seller accepts a new bidder on a public auction, all bids from that buyer will be automatically accepted. The seller may choose to remove the user from their list of accepted bidders. The user's previous bids will stand, but they won't be able to place additional bids.
Private sale offers are automatically rejected by Flippa if the seller takes no action for 72 hours after the offers are made.
Buy It Now bids made with PayPal instant payments are automatically accepted by Flippa as soon as the PayPal payment is confirmed.