Synonyms for voucher

Noun

1. voucher, verifier, supporter, protagonist, champion, admirer, booster, friend

usage: someone who vouches for another or for the correctness of a statement

2. voucher, document, written document, papers

usage: a document that serves as evidence of some expenditure

3. coupon, voucher, commercial document, commercial instrument

usage: a negotiable certificate that can be detached and redeemed as needed