Please check appropriate authorization boxes: ❑ All Activities. ❑ Pick Up Licenses.This Authorization Letter sample is available for use on UpCounsel. The format of an authorization letter should include the date, the name of the person to whom it is addressed, details about the person who has been authorized. Please include a Customer Order Form with your filing. Detailed instructions are included in the complete packet for each type of filing. Download a proof of residency letter template for family members, notarized or non-notarized, tailored for legal use. Please include a Customer Order Form with your filing. Detailed instructions are included in the complete packet for each type of filing. It's crucial to tailor the content of the letter to meet the specific requirements of the requesting organization or authority.