voucher

/ˈvaʊʧər/

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

中文释义：担保人；证人

He acted as a voucher for the accuracy of the financial report.

他作为担保人确保财务报告的准确性。

The court required a voucher to verify the defendant's statement.

法庭需要一名证人来核实被告的陈述。