During helicopter operation observed a man boarding chopper without his name in passenger manifest because he get confuse and going on the wrong flight. TOFS called HLO and Pilot to recheck passenger name and to clarify personnel onboard the aircraft. This is a safety concern and not an option. Any passenger, bag or cargo that has not been weighed, will be refused to board the aircraft. Also the manifest is a legal document, passenger weight and pieces of bags or cargoes shall be the same as actual number being loaded on the aircraft. All agreed