Vt. Stat. tit. 12 § 856
Service of process by virtue of section 855 of this title shall be made by delivering to the Secretary of State duplicate copies of the process, with the officer's return of service thereon, and a fee of $25.00, to be taxed in the plaintiff's costs if he or she prevails. The Secretary shall forthwith forward one of the duplicate copies by registered mail prepaid to the corporation at its principal place of business in the state or country where it is incorporated, which principal place of business shall be stated in the process. The service shall be sufficient if a copy of the process, with the officer's return thereon showing the service upon the Secretary of State, is sent by the plaintiff to the foreign corporation by registered mail, and if the plaintiff's affidavit of compliance herewith is filed with the process in court. The Secretary shall file one of the copies and endorse upon each copy the day and hour of service.
12 V.S.A. § 856