(PLACE ON BANK'S LETTERHEAD STATIONERY). Date. A letter of credit or bond can be set up to renewal annually until the final inspection occurs confirming the project is complete.General Program Guidelines. 1. A "sample" Letter of Credit format is on the Department of Permitting Services (DPS) website. SIGNATURE. Type your name in the box. After this page, continue to submit the applicaiton until you see a "THANK YOU" message.