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. How to correctly format a business letter.Includes detailed instructions and example on how to write a business letter for any situation. If information is to be enclosed, (i.e. A resume or transcript) then it is appropriate to place the word. Add an enclosure notation after your signature at the end of the letter, and abbreviate it with "Enc." or "Encl. The Operations Order manual is divided into nine (9) sections as listed below, a Table of Contents, Index, and Status List. The enclosure letter should be designed to serve those persons as well. 6 UNIT Unit 6 87 Correspondence LESSON 26 Business Letters LESSON 27 Business Letters With Enclosure Notations LESSON. I am writing to express my interest in the Personnel Analyst position that was advertised in The Arizona Republic on April 12, 2002.