If the online signing of the contract has not been completed, it is relatively simple to change the name at this time, because it does not involve the change registration of the housing management department, which is only equivalent to changing the unregistered contract to the parties, and only needs to sign a new contract with the consent of the other party. If the online signing contract has been completed, the other party not only needs to agree to change its name, but also needs to go to the housing management department for cancellation of registration. After cancellation, the newly signed contract will be registered, and the procedure is more troublesome. In addition, it should be noted that if mortgage to buy a house has gone through the formalities of bank loan and mortgage, besides changing the name of the house purchase contract, it should also cancel the loan contract and mortgage contract with the lending bank. If the bank has not yet lent money, and the bank agrees, both parties can cancel the mortgage agreement. If the bank has issued a loan, it needs to repay it in full in the name of the lender after the bank agrees. Therefore, lawyers remind everyone that they must think carefully before buying a house. It's simple to say, it's troublesome to buy a house and change its name, which will waste a lot of time and money.