Can I add my girlfriend's name without a marriage certificate?

Legal analysis: Yes, because it is entirely possible to write two people's names when buying a house and writing the real estate license. If you write the names of both husband and wife, you don't need to provide a marriage certificate, so you can add the woman's name when buying a house without a license.

Legal basis: Article 146th of the Civil Code of the People's Republic of China

Marriage should be entirely voluntary by both men and women, and it is forbidden for either party to force the other, and any organization or individual to interfere.

Article 147 The age of marriage shall not be earlier than 22 for men and 2 for women.

article 148 direct blood relatives or collateral blood relatives within three generations are prohibited from getting married.

Article 149 Both men and women who want to get married shall apply for marriage registration in person at the marriage registration office. Those who meet the requirements of this law shall be registered and issued a marriage certificate. The marriage relationship is established when the marriage registration is completed. If the marriage registration is not completed, it shall be re-registered.

article 15th after a registered marriage, the woman may become a member of the man's family and the man may become a member of the woman's family according to the agreement between the man and the woman.

Article 151 A marriage is invalid under any of the following circumstances:

(1) Bigamy;

(2) Having a kinship relationship that prohibits marriage;

(3) Underage for marriage.