The following materials and steps are usually required for a lawsuit: A complaint: A complaint is a written document that the court accepts a lawsuit. It should include the plaintiff, the defendant, the lawsuit request, the facts, and the reasons. It was generally required to use standard font and format, and to sign and seal according to the requirements of the court. 2. Evidence: The complaint should list the evidence, including the name, source, content, purpose of proof, etc., and number and organize them according to the type of evidence. The evidence needed to be true, sufficient, and powerful to prove the claims. 3. Litigant fees: The amount of litigation fees that need to be paid when suing varies according to different regions and the circumstances of the case. 4. Ways of suing: The prosecutor can go to the court to file a lawsuit in person or submit a complaint by mail or email. Both methods required a copy of the complaint and payment of the corresponding litigation fees. The following points should be noted when writing a complaint: 1. The content should be concise and concise. The content of the complaint should be concise and avoid using overly complicated vocabulary and sentences. 2. Standard format: The complaint should be written according to the requirements of the court, including the prosecutor, the defendant, the lawsuit request, facts and reasons. 3. List of evidence materials: A list of evidence materials should be listed in the complaint, clearly listing the name, source, content, purpose of proof, etc. of each evidence. 4. The authenticity of the evidence: In the complaint, the authenticity of the evidence should be clearly stated to avoid the submission of false evidence. 5. Sign and stamp: A signature and stamp are required at the end of the complaint to confirm the identity and authenticity of the prosecutor. The above are the basic materials and writing requirements of the lawsuit. The specifics should be adjusted and supplemented according to different regions and cases.