20 CFR § 30.416 - How and when should medical reports be submitted?
(a) The initial medical report (and any subsequent reports) should be made in narrative form on the physician's letterhead stationery. The physician should use the Form EE-7 as a guide for the preparation of his or her initial medical report in support of a claim under Part B and/or Part E of EEOICPA. The report should bear the physician's handwritten or electronic signature. OWCP may require an original signature on the report.