Generally, the householder on the real estate license is the signatory of the purchase contract. If you want to add someone else, it depends on the specific situation: just add your spouse's name. When handling the real estate license, both husband and wife can sign for confirmation;

Not if you add someone else's name. Because the housing sales contract has been reported to the housing management department for the record, it cannot be changed casually. After the real estate license is completed, it can be changed in the form of sale or gift (tax must be paid according to regulations).