Letters of request not only help you secure what you need, but they also can help establish a relationship with the person or organization you are addressing. The key is to write with confidence and be concise so the request is easily fulfilled. Whether the letter is to ask for a copy of an important document, a pay raise, or for someone's participation at an event, the end should leave the reader with a clear idea on how to proceed.
Make no apologies at the end of the letter, regardless of the magnitude of your request. This is part of writing with confidence. You should expect that your request will be approved.
Include a brief statement regarding compensation toward the end of the note in order to make it clear that you are willing to give something in exchange for what you would like to receive.
List your contact information before closing the request. These details should be listed in the order you would like to be contacted. So if you prefer to talk over the phone, list your phone number first and then an e-mail address or mailing address. Given this information, the reader will have more time to focus on filling the request instead of spending time searching for your contact info elsewhere.
Close the letter with a courteous, brief salutation such as "Thank You" or "Sincerely." In this way, you are expressing gratitude since the reader will have to consider sharing his or her resources.