A valid rental deposit receipt can generally be written like this: Today I received the deposit for the house No. - - for rent: how much in RMB and within how many days to sign the formal contract. If Party B follows the agreement If Party B signs the contract, it will be a breach of contract, and the deposit paid will not be returned; if Party A fails to sign the contract within the agreed date, the deposit will need to be returned twice. Article 490 of the Civil Code states that if the parties conclude a contract in the form of a contract, the contract shall be established when both parties sign, seal or fingerprint the contract. Before signing, sealing or fingerprinting, one party has performed its main obligations and the contract is established when the other party accepts it. Laws and administrative regulations stipulate or the parties agree that a contract should be concluded in written form. If the parties do not use written form but one party has performed its main obligations and the other party accepts it, the contract is established.