be·half /bɪˈhæf, ˈhɑf/
Be·half n. Advantage; favor; stead; benefit; interest; profit; support; defense; vindication.
In behalf of his mistress's beauty. --Sir P. Sidney.
Against whom he had contracted some prejudice in behalf of his nation. --Clarendon.
In behalf of, in the interest of.
On behalf of, on account of; on the part of.
n 1: as the agent of or on someone's part (usually expressed as
"on behalf of" rather than "in behalf of"); "the
guardian signed the contract on behalf of the minor
child"; "this letter is written on behalf of my client";
2: for someone's benefit (usually expressed as `in behalf'
rather than `on behalf' and usually with a possessive);
"in your behalf"; "campaigning in his own behalf"; "spoke
a good word in his friend's behalf"