Volunteer opportunities are available seven days a week. Here is a sample letter that you would have them fill in with supervisor from the volunteer place.This letter provides the ONLY certified verification of your completed volunteer hours. If lost, it cannot be reissued without additional verification. What information do I need to fill out? You will need the volunteer's name, title, your organization name, and contact information. For adult volunteers (not in high school and age 18 and older), please complete the Volunteer Application for our year-round program. I am writing to inquire about a volunteer opportunity with your organization. Each volunteer must complete an online application. Attend an information class.