There are no strict rules and requirements for the time of down payment in the sale of second-hand houses, as long as the down payment is completed before the transfer.

The following is the down payment time for bank supervision:

1. Both parties sign the stock house sales contract through the online stock house transaction signing system, choose the transaction supervision and choose the supervision bank to sign the transaction supervision agreement.

2. According to the transaction supervision agreement, the buyer shall deposit the supervision funds into the sub-account opened by the supervision bank once or several times within the agreed time limit.

3. If buyers need to apply for mortgage loans, they can submit loan applications through the supervision system and submit the loan information to the accepting bank.

4. After receiving all the agreed supervision funds, the buyer and the seller shall apply to the real estate transaction or real estate registration department in the area where the house is located for the transfer registration of the house.

5. After the buyer and the seller handle the transfer registration, the supervision bank will transfer the supervision funds and interest into the agreed account according to the supervision agreement.