I am having a brain lock today

My recollection is that there was a post a while back regarding an ODFI's responsibility to validate the beneficiaries of ACH transactions submitted by the Originator. If I recall right, there was a response regarding bundled v unbundled transactions. Specifically, if the originator submitted the file to the ODFI the in a bundled format, the ODFI did not have to unbundle and test against the OFAC list. This makes sense, BUT I would like some confirmation (cite of NACHA rules). I have access to the NACHA Rules but they are more complex than the instructions on programing my VCR
Please advise. - My brain has taken a beating today!!!!
Thanks