Will his vouchers vouch him no more? --Shak.
The great writers of that age stand up together as
vouchers for one another's reputation. --Spectator.
2. A book, paper, or document which serves to vouch the truth
of accounts, or to confirm and establish facts of any
kind; also, any acquittance or receipt showing the payment
of a debt; as, the merchant's books are his vouchers for
the correctness of his accounts; notes, bonds, receipts,
and other writings, are used as vouchers in proving facts.
3. (Law)
(a) The act of calling in a person to make good his
warranty of title in the old form of action for the
recovery of lands.
(b) The tenant in a writ of right; one who calls in
another to establish his warranty of title. In common
recoveries, there may be a single voucher or double
vouchers. --Blackstone.