Article 46 of the Marriage Law clearly stipulates that if divorce is caused by one party's bigamy or illegal cohabitation outside marriage, domestic violence or abuse, or abandonment of family members, the innocent party has the right to claim damages. The innocent party has the right to claim damages, which is reasonable and legal. The premise is that the innocent party must be able to prove the existence of the other party's fault, so it is particularly important to collect evidence in such proceedings.
 Collection of evidence of infidelity and divorce:
 1. Fixed volatile evidence
 If possible, the Ministry of Public Security should be entrusted to deal with the mobile phone message content, e-mail content, computer blog diary, and chat records of one party to the marriage and the extramarital object.
 If conditions do not permit, you should try your best to store them in a fixed way. SMS messages can be taken with a digital camera together with your mobile phone, and computer and network data can be captured in full screen.
 2. Collect literal evidence
 Written materials in the form of "confession", "letter of confession", "letter of guarantee", "agreement", etc. written by one party to the marriage at the initial stage of the sudden exposure of the affair, due to feelings, urgency or repentance.
 3. Collect audio-visual evidence
 The audio recordings of the negotiations between the husband and the wife on matters related to marital affairs are mainly collected by the parties themselves;
 Videos and photos of one party to the marriage and a third party's behavior in public places, such as going out in pairs, holding hands, or going in and out of the room. These evidentiary materials are collected by a private detective agent of a third party's investigation company, which is more safe, reliable, and has independent evidentiary effect.
 4. Collect on-site evidence