The issuance of the initial contact letter and enclosure shall be documented in the case file. 8. 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.The purposes of the title IV-E foster care eligibility review were to (1) determine if. To do this, refer to the exhibit in the document, assign it a letter or number, and then attach it with a label using that letter or number. Enclosure (1) of this instruction. When submitting via DON TRACKER, submit to: a. Staff officers are responsible for completing staff papers and other written correspondence on time, on target, and in the required format. Identify an enclosure to accompany a letter in the body of the letter. EXAMPLE: Separate Cover: Form Letters Handbook. Instructions for completing Form.