1. Maintenance company information: the name, address and contact information of the maintenance company should be clearly marked on the maintenance certificate to ensure the authenticity and credibility of the certificate. This allows users or interested parties to contact the maintenance unit and verify the maintenance.
2. Maintenance date and time: The maintenance certificate shall clearly record the specific date and time of maintenance, so that users or interested parties can understand the timeliness and continuity of maintenance. This is also an important basis to prove the effectiveness and legality of maintenance.
3. Maintenance contents and expenses: The maintenance certificate shall describe the specific contents of maintenance in detail, including the cause of failure, maintenance methods and parts used.
4. Signature and contact information of maintenance personnel: the maintenance certificate should have the signature and contact information of maintenance personnel to ensure the authenticity of maintenance and the traceability of responsibility. The signature of the maintenance personnel is the confirmation and commitment to the maintenance work, and the contact information can be provided to users or interested parties for further communication and consultation.