How To Write A Letter Asking For A Favor . Also, tell the reader why he/she can help you. You're the only person who knows me well enough to give me a referencefor a course i want to do. How to Write Claim Letter and Request for Favours? from www.businessmanagementideas.com It’s okay to ask a favor, and it’s okay to do it plainly. Make sure you aren’t so shy about what you’re asking for that you make it hard to understand. How to write this letter: