借条的英语怎么说

借条的英文：
iou

I haven't any money; can I give you an iou for $10?
我没钱了,我可以给你一张借条借十块钱吗?

You still owe me a hundred pounds,and I have your promissory note to that effect.
你仍然欠我100英镑，我有你的借条。

We undercharge Mr.Smith and have to send him a debit note for the extra amount.
我们少收了史密斯先生的钱，只得给他寄去一张借条所要欠款。

We should not issue ious to the farmers.
不应给农民发白条。