Couples whose marriage certificate is lost and cannot be found can go to the Marriage Registration Office of the Civil Affairs Bureau to reissue your marriage certificate. Of course, many procedures are required when reissuing your marriage certificate. It is recommended that you consult the Marriage Registration Office of the Civil Affairs Bureau first, prepare these documents, and then go there to reissue your marriage certificate. After that, we can go through the normal divorce procedures.
 If you don't want to delay the time of divorce, you can go to the civil affairs marriage registration office to directly issue a marriage relationship certificate. Of course, you must make the other party believe that you are husband and wife, or provide some personal information. The marriage registration office will also help you check the relevant information.
 Some marriage registration departments are unwilling to provide you with proof of marriage relationship, because mistakes may occur. At this time, you'd better go to the local police station where your registered permanent residence is located to complete the corresponding formalities. Generally, if your household registration is on a household registration book, you can ask the police station to issue a household registration certificate. At this time, the household registration certificate can also be used to handle divorce procedures.
 If you belong to a village or neighborhood committee, you can also open a residence there. Let them prove that you are husband and wife, that is, marital relationship certificate. In this way, you can go through the divorce procedures with the marital relationship certificate.