Synonyms for "in the name/authority of" could include "under the auspices of," "on behalf of," "with the permission of," "by mandate of," "pursuant to," "in compliance with," "in accordance with," or "in conformity with." These phrases all imply that the actions being taken are authorized or sanctioned by a specific party or institution. They are commonly used in legal documents, business contracts, and official communications to clarify who is responsible for certain decisions or activities. By using synonyms for "in the name/authority of," writers and speakers can convey their intentions more precisely and avoid any ambiguity or confusion about their legitimacy.