I gave up on receiving the unpaid salary.

My unpaid liabilities are still $100.

I have an outstanding debt of 10 dollars.

We have asked you repeatedly to settle your outstanding account for the invoice No.1111.

If you have not paid because you are displeased with something we have done, would you tell us what it is?

If an oversight is the reason why you have not paid, please send us the amount due, and let us solve the problem immediately.

This is the second mail we send you referring to the invoice No.1111 which has not been settled.