Cash payment is not required at auctions. Auction companies accept multiple forms of payment: cash, check, or credit card. When attending real estate auctions, auction companies may at times require a specific down payment on-site in the form of a cashiers check to qualify as a bidder. Financing is available on auction day with many auction companies where lenders can qualify you for loans on-site. It is important that prospective bidders read all documents regarding the sale prior to auction day.