affy

To have faith in (someone); to trust.

Chiefly followed by that or to: to formally affirm or promise (something).

Chiefly of a man: to formally promise to marry (someone, chiefly a woman); to be engaged to; also, to marry (someone); to espouse.

He, though affide unto a former love, / To whom his faith he firmely ment to hold, / […] Her graunted love, but with affection cold […]

Chiefly followed by to, unto, or with: often of a parent or guardian: to formally promise that (someone) be married to another person; to affiance, to betroth.

Followed by in, to, or unto: to bind or pledge (someone or something) to another person or thing.

An affidavit to be signed by a contest winner to confirm eligibility.

If you have won a monthly prize, they will send you an affy and have you send it back. Then your prize comes from a courier.

The contest ended in mid November, I got the affy Christmas eve, and I picked up the car February 4th or 5th.