We sent out UCC4A notices to our business customers and now only give new customers the notice. We ordered them from our ACH Regional Payment Association. (For a big chunk of the country, that is MPX in Kansas City).
The notice covers provisional payment, notice of receipt of entry and choice of law.
In the Notice of Receipt of Entry section it says "Under the operating rules of the National Automated Clearing House Association, which are applicable to ACH transactions involving your account, we are not required to give next day notice to you of receipt of an ACH item and we will not do so. However, we will continue to notify you of the receipt of payments in the periodic statement we provide to you."
I hope this helps.