deputize
verb
[ ˈdɛpjʊtʌɪz ]
• temporarily act or speak on behalf of someone else.
• "the post-holder is required to deputize for the manager in their absence"
Similar:
stand in for,
sit in for,
fill in for,
cover for,
substitute for,
replace,
take the place of,
understudy,
be a locum for,
relieve,
take over from,
hold the fort,
step into the breach,
act for,
act on behalf of,
speak on behalf of,
represent,
sub for,
pinch-hit for,