When all objections so stated have been determined by the listers, they shall amend such abstract relating to the persons so aggrieved, if they shall so determine, and shall add thereto a certificate signed by them setting forth such amendments. By June 9, notice in writing of such amendments therein made shall be forthwith delivered or mailed postage prepaid to each of the persons filing such objections. The notice shall inform the taxpayer that he or she may appeal from this decision to the Board of Civil Authority by lodging his or her appeal with the town clerk within 14 days of the mailing of the written notice of amendments. Unless the personal notices required by this section were sent by registered or certified mail, or unless an official certificate of mailing of the same was obtained from the post office, in the case of any controversy subsequently arising it shall be presumed that the personal notices were not mailed as required. (Amended 1983, No. 85, § 8; 1993, No. 49, § 23, eff. May 28, 1993.)