Word: 凭证 (píngzhèng) Traditional: 憑證 凭证 dictionary entry píngzhèng proof; certificate; receipt; voucher Full dictionary entry for 凭证 Example sentences using 凭证 2 sentences, showing page 1 of 1. 请保留好购物凭证。 Qǐng bǎoliú hǎo gòuwù píngzhèng. Please keep your shopping receipt safe. 请留好凭证，退货时要用。 Qǐng liú hǎo píngzhèng, tuìhuò shí yào yòng. Please keep the receipt, since you'll need it for returns.