Get your Texas certificate of authority. Harbor Compliance will apply for and obtain your certificate of authority.To add a Letter of Authority to your account: Please fill out the Letter of Authority form. Option B: Power of Attorney Document. In order to make a bank authorization letter, it's important to empower someone with bank relates issues, for example in taking collecting or sign on documents. Notice to the Bank of Changes in Authorized Account Signers. How to Obtain a Letter of No Objection from the Banking Commissioner in Order to Use Certain Words in a Proposed Business Title. Received a letter of tax exemption from the Texas Comptroller. This form should be used when authorizing Blue Cross and Blue Shield of Texas to disclose an individual's Protected Health. Get the resources you need to help navigate someone else's financial affairs.