Generally, when the house is sold, the deposit is paid, so the contract will definitely be signed, and the division of liability for breach of contract will be clearly written in the contract. If the developer defaults first, then the developer not only needs to refund the deposit, but also has the responsibility to compensate the buyers. But if the buyer defaults for personal reasons, in this case, there is no way to complain to the developer. At this time, you can first find the developer to coordinate, or find the relevant administrative organ to report the case, but the other party can not refund the deposit, depending on the results of negotiation between the two parties.