On Tuesday, June 11, Siniscalchi issued a $200 check on the drawee, Valley Bank. On Saturday morning, June 15, the check was cashed. This transaction, as well as others taking place on that Saturday morning, was not recorded or processed through the bank's bookkeeping system until Monday, June 17 On that date, Siniscalchi arrived at the bank at 9:00 A.M. and asked to place a stop payment order on the check. A bank employee checked the bank records, which at that time indicated the instrument had not cleared the bank. At 9:45 A.M. she gave him a printed notice confirming his request to stop payment. Siniscalchi sought to recover the $200 paid on the check. Explain whether the stop payment order was effective.