Donald works for Bush, Carter and Mueller LLP as a staff accountant. Donalds employer does not have the cash to meet its current payroll obligation. On December 24, 2018, Bush, Carter and Mueller gives Donald a promissory note for the value of his unpaid salary with a due date of April 30, once tax season concludes and the firm expects to have cash flow from billings. What are the tax consequences for Donald receiving the note?