You need a letter with a letter head. If your unit does not have stationary make your own. Make
sure that you include address and phone in the letter head. You may also want to include something that sets your unit
apart, or shows the work you do in the community.
The body of the letter should include the dates and times you are requesting.
Your Tax exempt number needs to be either in the Letter Head, or somewhere in the body of the Letter.
Send it CERTIFIED MAIL you want a receipt with the name of who received it, and when.
Keep a copy for your records