A formal business letter should make the reader aware that you are enclosing documents. In this article, we explain what an enclosure is and how to cite one, and we provide an example of an enclosure in a business letter.Except for required stairway enclosure doors, free egress locks shall have the words "FREE EGRESS" written on the tag number line of the door call-out circles. Complete page 1 of this form and submit the following to a TxDMV Regional Service Center: 1. Attention: Appeals Coordinator.