To act as a substitute for a person in their role or office
to officially empower and authorize (someone) to act as a substitute in one's role or office
To officially empower, authorize, pronounce, and establish (someone) to be a deputy.
To substitute for somebody or something.
To complete a form or questionnaire with requested information.
To beat up; to physically assault.
To fill; to replace material that is absent or has been removed.
To inform somebody, especially to supply someone missing or missed information.