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.First, to begin the letter, start with a warm greeting and mention your sponsor's name. Don't jump right into the letter. If you are enclosing materials with your business letter, you'll need an enclosure notiation. Learn more with our enclosure letter sample. Re: Fulton Terminals Site - Draft Supplemental. You could say, "the following items are enclosed:". You could also say, "please find the enclosed items listed below:" and then list the items. Provide education, training, and guidance related to well installation, protection, evaluation, chlorination, sampling and abandonment.