Is there any legal protection for a man to write a letter of guarantee after cheating?

Legal analysis: If the content of the letter of guarantee issued by the husband does not exceed the scope of the joint property of the husband and wife, does not violate the provisions of the compulsory law, and belongs to the husband's true intention, without the coercion of the woman, it can be used as the basis for the division of divorce property, and it will take effect with conditions.

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. In any of the following circumstances, if mediation fails, divorce shall be granted:

(a) 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.