You can bring a lawsuit to the court, and the following kinds of evidence are required for the lawsuit without alimony: 1. Evidence to prove the identity relationship, such as ID card, account book, etc;
 2. Whether there is evidence of blood relationship, such as household register, police station certificate, etc;
 3. Whether there is evidence of legal adoption relationship, such as adoption, placement agreement, adoption notarization, adoption registration, etc;
 4. Evidence of their own living conditions;
 5. Evidence of the defendant's income, such as salary certificate, income certificate, etc;
 6. Evidence of whether parents are dead or unable to support them, such as death certificate, disability certificate and income certificate;
 7. Evidence of whether income is significantly reduced and whether it affects normal life, such as salary certificate, income certificate and current living conditions.
 Legal basis
 Article 1085 of the Civil Code of the People's Republic of China [Bearing of child support after divorce] If a child is directly supported by one party after divorce, the other party shall bear part or all of the support. The number of expenses to be borne and the length of the time limit shall be agreed by both parties; If the agreement fails, the people's court shall make a judgment.
 The agreement or judgment mentioned in the preceding paragraph shall not prevent children from making reasonable demands to either of their parents when necessary in excess of the amount originally set in the agreement or judgment.