The last page of every paper served in accordance with Mass. R. Civ. P. 5(a) shall contain a brief statement showing the date on which and manner in which service of the paper was made on each other party. The statement may be in the following form:
I hereby certify that a true copy of the above document was served upon (each party appearing pro se and) the attorney of record for each (other) party by mail (by hand) on (date). (Signature).
As added July 18, 1989, effective October 2, 1989.