The original of every document filed with the Administration and required to be served upon all parties to a proceeding shall be accompanied by a certificate of service signed by the party making service, stating that such service has been made upon each party to the proceeding. Certificates of service may be in substantially the following form:
I hereby certify that I have this day served the foregoing document upon all parties of record in this proceeding by mailing, postage prepaid (or by delivering in person) a copy to each such party.
Dated at _________ this ______ day of ________, 19__(Signature)________
For________