Correct

字据

/ zìjù / 
Strokes

Definition

written pledge/contract/IOU

Example

As a Noun

written pledge (eg receipt, IOU, contract, etc)

1
Kǒushuōwúpíng
口说无凭
  
,
lì
立
gè
个
zìjù
字据
  
。

Since verbal statements are no guarantee, a written agreement must be made.

2
Xiě
写
le
了
yī
一
zhāng
张
zìjù
字据

write an IOU/a receipt