A Certificate of Use (also called a CU or zoning permit) is required before opening any business in Miami-Dade County. The name of the student applying must appear on the bank letter.If not, an additional notarized support letter will be required. 1. In the sample letter, fill in your personal information. Sample Letter. Date. For highly motivated students seeking an immersive academic program in a non-credit format. The letter must be on school letterhead and sent directly to AZBN from the educational institution. In the sample letter, fill in your personal information.