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. Add an enclosure notation after your signature at the end of the letter, and abbreviate it with "Enc." or "Encl.Channel letter sign means a sign composed of raised, cutout letters or symbols constructed of a material which mayor may not be illuminated. You could say, "the following items are enclosed:". You could also say, "please find the enclosed items listed below:" and then list the items. A Policy Management Committee has been formed for the Northern Portion. The word enclosure can be used. It not only means something that encloses , but also something that is enclosed . Card 4 of Flpure 10-2 aives an example of a change in NO emissions.