I. ˈvau̇-chər noun
Etymology: Anglo-French, summons to guarantee a title, from voucher, verb
Date: circa 1523
1. : an act of vouching
2.
a. : a piece of supporting evidence : proof
b. : a documentary record of a business transaction
c. : a written affidavit or authorization : certificate
d. : a form or check indicating a credit against future purchases or expenditures
3. : a coupon issued by government to a parent or guardian to be used to fund a child's education in either a public or private school
II. transitive verb
Date: 1609
1. : to establish the authenticity of
2. : to prepare a voucher for
III. noun
Etymology: vouch (I) + -er (II)
Date: 1612
archaic : one that guarantees : surety