Here is a sample of a letter containing scholarship request.
Congressional Hispanic Caucus Institute
504 C Street, NE
Washington, DC 20002
Dear Scholarship Coordinator:
I recently learned of the (scholarship/internship/fellowship) offered by your organization. I believe I would make an ideal candidate. Please send me an application and any other information pertaining to the (scholarship). I have enclosed a self-addressed stamped envelope for your convenience. Thank you for your assistance. I look forward to receiving the requested paperwork.
(Your mailing address)