Legal analysis: (1) The complaint should be submitted by the complainant to the competent labor administrative department. The complaint document shall contain the following items: the complainant's name, gender, age, occupation, work unit, domicile and contact information, the name and domicile of the complained employer, the name and position of the legal representative or principal responsible person, and the violation of labor security laws, regulations and rules; The fact that the legitimate rights and interests of labor security have been infringed and the matters requested by the complaint shall be signed or sealed by the complainant.

(2) the complainant's certification materials. Copy of the complainant's ID card (the original should be provided for verification); Copy of the business license or registration information of the employer (if it is really impossible to provide it, it may not be submitted after explanation). In case of a collective complaint about recommending a representative, a letter of recommendation signed by the recommender is also required.

(3) Relevant evidential materials. Submit necessary evidential materials to prove that the infringement of the complainant's legitimate rights and interests is caused by the violation of labor security laws by the complained employer, such as evidential materials to prove labor relations and complaints. Specific matters can be directly consulted with the Labor Bureau, subject to the requirements of the Labor Bureau.

Legal basis: Article 14 of the Provisions on Labor Supervision, labor security supervision is carried out by means of daily patrol inspection, examination of written materials submitted by employers according to regulations, and acceptance of reports and complaints.