A privately signed divorce agreement has no legal effect. The divorce agreement shall be signed at the marriage registration office and witnessed by the marriage registrar; The marriage registrar may affix "This document is consistent with the archived document, and the alteration is invalid. XXXX marriage registration office XX, XX, XX "rectangular seal. If both parties go through the divorce registration formalities in the marriage registration office and issue divorce certificates, the divorce agreement shall have legal effect.

According to the Regulation of Marriage Registration Work:

Article 56 When accepting an application for divorce registration, a marriage registrar shall follow the following procedures:

(1) separately ask the parties about their divorce wishes and their wishes for the contents of the divorce agreement, and make a record, which shall be signed by the parties after reading it.

(2) examine the documents and materials specified in article 55 of this specification. If a party applying for divorce registration has lost a marriage certificate, the party concerned shall declare the loss in writing, and the marriage registration authority may register the divorce according to another marriage certificate; If both marriage certificates of the party applying for divorce registration are lost, the party concerned shall declare in writing that the marriage certificate is lost and provide a copy of the marriage registration file stamped with the special seal for file search, and the marriage registration authority may handle the divorce registration according to the above materials provided by the party concerned.

(3) If both parties divorce voluntarily and reach an agreement on matters such as child support, property and debt disposal, both parties shall fill in the Declaration on Application for Divorce Registration;

The signature of the "declarant" column in the Declaration of Application for Divorce Registration must be completed by the declarant in front of the witness and fingerprinted;

The marriage registrar shall be the commissioner for oaths and sign in the column of commissioner for oaths.

(4) Both husband and wife should sign the divorce agreement on the spot; The marriage registrar may affix "This document is consistent with the archived document, and the alteration is invalid. XXXX marriage registration office XX, XX, XX "rectangular seal. One copy of the agreement is for both husband and wife, and one copy is filed in the marriage registration office. If a party requests the marriage registration authority to copy the divorce agreement due to the loss of the divorce agreement, it shall consult the marriage registration file in accordance with the provisions of the Measures for the Administration of Marriage Registration Files.

after the divorce registration is completed, if the parties request to change the divorce agreement or change the contents of the divorce agreement, the marriage registration authority will not accept it.