Grandpa bought a house for his son.

A: If Grandpa contributes to the purchase of a house for his grandson, the house property is registered in his personal name. According to the principle of public trust in real estate in China, the house property belongs to his grandfather and belongs to his grandson's personal property, and the ownership of the house property has nothing to do with his parents' divorce. According to Article 214 of the Civil Law of People's Republic of China (PRC), the establishment, alteration, transfer and extinction of real estate rights shall be registered according to law, and shall take effect when recorded in the real estate register, while Article 216 stipulates that the real estate register is the basis for the ownership and content of real estate rights.

If grandpa's contribution to buying a house for his grandson is his true intention, according to Article 143 of the Civil Law of People's Republic of China (PRC), a civil juristic act that meets the following conditions is valid: (1) The actor has corresponding capacity for civil conduct; (2) the meaning is true; (three) does not violate the mandatory provisions of laws and administrative regulations, and does not violate public order and good customs. In other words, the civil acts made under the premise of the above-mentioned legal provisions are legal and effective.

Gift means that the donor gives his personal property to the donee free of charge, and the donee accepts the gift. According to Article 685 of the Civil Law of People's Republic of China (PRC), the donor may revoke the gift before the right to donate the property is transferred. However, if the gift contract is notarized, the gift cannot be revoked. Article 659 of the Civil Code of People's Republic of China (PRC) stipulates that if the donated property needs to go through registration or other formalities according to law, it shall go through relevant formalities. However, it should be noted that according to Article 663 of the Civil Law of People's Republic of China (PRC), if the donee has one of the following circumstances, the donor may revoke the gift: (1) the legitimate rights and interests of the donor or the donor's close relatives have been seriously infringed; (two) the donor has the obligation to support and fails to perform; (3) Failing to perform the obligations stipulated in the gift contract. The donor's right of revocation shall be exercised within one year from the date when he knows or should know the reason for revocation. If the grandson who is the recipient has the above behavior, the grandfather who is the donor can cancel the gift.