"Payment forthcoming" note (3)
I believe the answer is:
iou
(Other definitions for iou that I've seen before include "Debt note (abbr.)" , "Creditor's note" , "Chit acknowledging debt" , "Promissory note" , "Debt acknowledgment" .)
I believe the answer is:
iou
(Other definitions for iou that I've seen before include "Debt note (abbr.)" , "Creditor's note" , "Chit acknowledging debt" , "Promissory note" , "Debt acknowledgment" .)