The phrase "duly elected" refers to a person who has been chosen for a position through a legitimate and lawful process. Alternative synonyms to this term can include "lawfully chosen," "legitimately elected," or "properly appointed." Other possible options for the same phrase could be "officially selected," "formally designated," or "validly voted in." All of these synonyms convey the idea of a person being accurately and legally chosen for a specific role, whether it is in politics, work, or any other area where selection through a proper process is required.