1.6.2 Document Types and Signing Authorities. This letter is to inform your office of the authorized signature(s) for our ARC Project Number _____.For Collin County Motor Vehicle Transactions. I,. (Name of Electricity Account Holder), hereby. The Billing Customer should fill in all required fields, enter an esignature, and select "Click to Sign". Select the Coordinator application type and then complete the electronic form, filling out all sections. Please complete all fields where applicable. How to fill out the Company Signature Authorization Letter? Social Security's Signature Service Options. Michael Collins was an Irish revolutionary, soldier and politician who was a leading figure in the early-20th century struggle for Irish independence.