My sister is buying a house, and the house sales contract does not take effect. What are the real estate ownership certificates?

It is determined that the value-added part of the house purchased by one spouse before or after marriage belongs to the personal property of one spouse. When divorced, the value-added part of the house will not be divided. Article 6: Before marriage or during the marriage relationship, one party gives the property to the other party. If the property has not been transferred, the gift can be revoked. Article 7 If a property purchased by one parent for their children after marriage is registered in the name of the investor's children, it shall be deemed as a gift to only one of their children, and the property shall be regarded as the personal property of one spouse. Article 7 If the property right of a house purchased by both parents is registered in the name of a child, the house can be recognized as shared by both parties according to their respective parents' share of capital contribution, unless otherwise agreed by the parties. Article 10: If the husband and wife sign a real estate sales contract before marriage, pay the down payment with personal property and borrow money from the bank, and repay the loan with the same property after marriage, and the real estate is registered in the name of the down payment payer, the real estate will be handled by both parties through agreement at the time of divorce. If no agreement can be reached in accordance with the preceding paragraph, it may be ruled that the real estate belongs to the party registering property rights, and the outstanding loan is the personal debt of the party registering property rights. After marriage, the amount paid by both parties to repay the loan and the corresponding value-added part of the real estate shall be compensated to the other party by the party handling the property right registration in accordance with the principle of the first paragraph of Article 39 of the Marriage Law. If you have any other questions about the above reply, you can call me directly and there will be a more detailed solution for you.