Fox Gold Exchange Inc., issued a $3500 check to Sally McKee to buy a purportedly genuine Rolex watch. The check was post-dated (assigned a date later than the actual one). McKee indorsed the check and presented it to R&R Investments, Inc., a check-cashing service. Without verifying that the check was valid, R&R cashed it. Meanwhile, FOX issued a stop-payment order on the check based on information that the watch was counterfeit. When R&R presented the check to FOX's bank for payment, the bank refused to honor (cash) it. Is R&R entitled to payment as a holder in due course? Why or Why not?