Legal analysis: Evidence can be collected from 1 and direct evidence. (1) sex video, which requires that it can be clearly determined that both parties who are having sex have not been edited; (2) Photographs of sexual behavior scenes, requiring information such as photo source, shooting time and place; (3) written approval, written guarantee, letter of commitment, confession, etc. Written by a party having an extramarital affair; In practice, the husband can be guided to review his long-term cohabitation with his lover in the "guarantee" and "repentance", and then notarized as strong evidence to identify "bigamy" or "illegal cohabitation". (4) I recognize the recording, and the actor himself also acknowledges the recording of extramarital affairs, demanding that the recording be true and legal. This requires that the way of obtaining evidence should be legal. In this regard, you can consult a lawyer first and ask what methods can be used and how to implement them. 2. Indirect evidence. (1) Children born out of wedlock need each other's consent, otherwise they need paternity test, which is very troublesome; (2) Ambiguous short messages are difficult to obtain, and forwarding is easy to arouse the suspicion of judges-have they been modified and forwarded to you? If conditions permit, the content of the short message can be notarized in time. (3) Witness testimony, it is difficult to independently prove the fact of extramarital affairs; (4) Recorded materials, some voice records related to extramarital affairs;
Legal basis: Article 1079 of the Civil Code of People's Republic of China (PRC), if one of the spouses requests a divorce, the relevant organization can mediate or directly file a divorce lawsuit with the people's court. When trying divorce cases, the people's court shall conduct mediation; If the relationship has indeed broken down and mediation is ineffective, divorce should be granted. Divorce shall be granted if mediation fails under any of the following circumstances: (1) bigamy or cohabitation with others; (2) committing domestic violence or abusing or abandoning family members; (three) gambling, drug abuse and other bad habits; (four) separated for two years due to emotional discord; (5) Other circumstances that lead to the breakdown of the marriage relationship. If one party is declared missing and the other party files a divorce lawsuit, the divorce shall be granted. After the people's court ruled that divorce is not allowed, if the two parties have separated for one year and one party files a divorce lawsuit again, divorce shall be granted.