Can someone explain to me what this is and if it needs to be included in the W-9 certification as part of an acknowledgement that the applicant is not subject to FATCA reporting? I am getting conflicting information. Thanks.

FATCA requires certain U.S. taxpayers who hold foreign financial assets with an aggregate value of more than the reporting threshold (at least $50,000) to report information about those assets on Form 8938. Not sure what this has with a domestic bank. You have more information to what you are referring too?

Unless you are talking about reporting non-resident alien interest on the 1042-S forms, but that involves W-8s and not W-9s.