In the US you would not need a letter to withdraw funds. Details of the Authorized Person: Mention the full name, ID number, and other identification details of the person you are authorizing.Learn how to write an effective authorization letter for bank withdrawal and ensure smooth transactions. Get tips and examples now! Header of the Authorization Letter. You can call us at 800-344-1029 to enroll in phone withdrawal authorization. You can also complete this form entirely online. There are currently 3 ways to complete this form: Easy-Fill: Fill out the form online, then print and mail it to CSLB with the appropriate fee. Complaint fill in. PDF. Click on the link(s) for the forms you'd like to download.