The quantity of u.s. dollars demanded in the currency market depends in part on:

The quantity of U.S. dollars demanded in the currency market depends in part on transfer payments from foreign individuals, firms or governments to the U.S. Transfer payments is when money is given or income is received when no goods or services are being paid for. Because money is being given but nothing is being paid for, they are considered payments and potential income. 

He will be debiting accounts payable and crediting notes payable. According to the concept of accounting, a liability will be gained if it is recorded as a credit and will be lessened if the liability is debited. In this situation, the accounts payable will be lessened and will be replaced by a notes payable instead. So in order to lessen the accounts payable, you have to debit it. Of course you will also be gaining a notes payable. You can do this be crediting the notes payable.