Please see Section III, Chapter I of the Operating Guidelines section of the ACH Rule book. It starts on page OG62. Item # 4 "Response to Prenotification Returns and Notification of Change" states, "There are three ways that an Originator can receive a response to a prenotification. The prenotification can be: returned by the ACH Operator as unprocessable; returned by the RDFI; or result in the origination of a Notification of Change (NOC) from the RDFI." ... "These methods of return and notification of change are addressed completely in Chapter II Notification of Change and Chapter III, Returns, Dishonored Returns, and Contested Dishonored Returns."
Pre-note rules are on page OR5 and OR16 in the Rules section. The way I read Section 4.1.2 on OR16, the RDFI verifies the account number. If there are errors, the RDFI can reject the transaction. If the account number and name do not match, the RDFI can rely solely on the account number for purposes of posting.
I hope this helps.