When size, weight, or other factors prevent sending an enclosure with a letter, send it separately and type "(sep cover)" after the enclosure's description. (2) They must be listed numerically in the order they are cited in the text, and all enclosures must first be cited in the instruction letter.An enclosure marking goes in the lower right corner, whether the text is arranged in portrait or landscape orientation. Send the letter directly to the office, department or individuals involved in the situation. Simply sending the letter to the ombudsman is not appropriate. This page provides handouts for the different applications submitted to the Building Division. Example: A Sailor assigned to permanent duty station. Camp Pendleton is ordered (relocation not authorized) to permanent duty station San Diego. Enclosures. An enclosure can prevent a letter from becoming too detailed. This instruction applies to all military personnel assigned to Naval Medical Center San Diego.