deposit (earnest money)
money put down by a potential buyer to show that they are serious about purchasing the home; it becomes part of the down payment if the offer is accepted, is returned if the offer is rejected, or is forfeited if the buyer pulls out of the deal. During the contingency period the money may be returned to the buyer if the contingencies are not met to the buyer's satisfaction.
Source: U.S. Department of Housing and Urban Development