Volunteer service record: submit a volunteer service record form or volunteer service log to record the detailed information of volunteer service activities, including service time, place, content, etc. Volunteers need to fill in and sign as required, and ensure the authenticity and accuracy of the records.

Letter of proof or certification materials: Individual volunteer service organizations can provide letter of proof of volunteer service or relevant certification materials to prove the length of volunteer service and the situation of participating organizations. These certificates or materials shall be signed or sealed by the person in charge of the organization or relevant institution.

Identification: Provide valid identification, usually ID card or other valid identification documents. This is to verify the identity information of volunteers and ensure the accuracy and reliability of the certification process.

Volunteer application form: fill in the volunteer application form and provide basic personal information, such as name, age and contact information. The application form for volunteers is an important reference for organizations to understand the basic situation and wishes of volunteers.

Letter of recommendation for volunteer service: Individual organizations may require volunteers to provide letters of recommendation for volunteer service, which are generally issued by organizations or related institutions that have participated in volunteer service activities. Letter of recommendation usually introduces the work performance, contribution and influence of volunteers.

Please note that the above materials and procedures are only general, and the specific requirements may vary according to different organizations, regions and certification purposes. It is recommended that you communicate with relevant organizations or institutions before participating in volunteer service activities.

Understand the specific certification requirements and processes, prepare the required materials as required, and complete the relevant procedures. This can ensure that your volunteer time can be effectively certified and get corresponding proof and recognition.