Correct

凭单

/ píngdān / 
Strokes

Definition

bill of warrant (certificate, allowing one to collect money or valuables)

Example

As a Noun

certificate for drawing goods, money, etc; voucher

1
Lǚguǎn
旅馆
píng
凭
dān
单

hotel voucher

2
Píng
凭
dān
单
biānhào
编号

number of invoice