What is the deposit 1? A certain amount of money paid to ensure the performance of obligations. 2. A certain amount of money paid by a criminal suspect or defendant to a court, a procuratorial organ or a public security organ to ensure that he does not evade trial. Third, the difference between deposit and deposit is a kind of security interest, which is a special form of pledge guarantee, that is, the debtor or a third party gives a certain amount of money or equivalent to the creditor for possession in order to guarantee the performance of the debt, and when the debtor fails to perform the debt under the contract, the creditor can get priority compensation from the deposit. Deposit is a customary way in the process of non-governmental transactions, and this kind of guarantee is neither explicitly recognized nor prohibited by our laws. Security deposit refers to the money reserved or deposited by one or both parties to a contract in a third party to ensure the performance of the contract. This concept is widely used, such as contract bond, performance bond in bidding, bond in futures trading, and even bond in bail pending trial.