Whether it is necessary for both husband and wife to sign the ownership transfer book at the scene should be determined according to the ownership of the house. If the house belongs to the joint property of husband and wife, it needs to be signed by both husband and wife when selling the house. If one party is not on the scene, it is necessary to explicitly authorize others to entrust others to sign. However, if the property belongs to the personal property of one spouse, only one owner needs to sign it when selling the house. In short, it depends on the names of several people on the real estate license. If there are two people, you need to sign a contract. Selling a house means that the owner of the house transfers his house (including the homestead) to the buyer, who accepts the house and pays the price agreed by the owner. This process involves signing a house sales contract, and both buyers and sellers need to go through the formalities of property right transfer at the Housing Authority where the house is located. This is done in order to establish the relationship between housing sale and purchase, and it is also an important basis for handling disputes over housing sale in the future.