A bona fide purchaser is commonly referred to as a BFP in legal and banking circles. A BFP is a person who has purchased an asset for the stated value, with a honest belief that the seller had the rights to make such a sale. A BFP is unaware of any fact which would cause a reasonable person to doubt on the right of the seller to have sold it in good faith. This is relevant in the situation of a seller without good title to an item who sells the item to a BFP and the true owner later shows up to claim title. In this situation, the BFP will be able to keep the asset, and the real owner will have to look to the fraudulent seller for reimbursement.
