Formal Financial Authorization Letter Formal business letter sample by Expert Writer - January 11, 2016February 7, 20200 Mark Smith 111 Main St. San Francisco, ZIP January 11, 2016 Mr. John Jacobs USA Bank Acctual 545 Main Road SAN Francisco ZIP RE: Formal Financial Authorization Letter Dear Mr. Smith, I, Mark Smith, am writing this letter to designate that I authorize JANE SMITH, my wife, SSN: 654619681489461, to act on my behalf with regard to checking account IT356277752185224 while I am out of country between the dates of March 1, 2016 and April 25, 2016. I appreciate both your and Mr. Ford’s assistance in this matter. Sincerely, Mark Smith