All third-party billing letters must:

1. Be printed on company letterhead and addressed to Harvard University.
2. Include student name and Harvard ID 
3. Indicate the start and end date of the sponsorship
4. List all fees your organization will cover 
5. Indicate the maximum amount that will be paid, if applicable
6. Include any special billing instructions
7. Include the complete billing address of your organization, including a primary contact name, email address, phone and fax numbers
8. Be signed by an authorized official