Agreed with all of the above. As an attorney, the stuff people bring through our doors to open accounts and explain their business structure is tough sometimes. It causes my front-line employees confusion. In a lot of cases, the customer insists an account titled a particular way. If the customer puts up a hassle, we do it for them, but from a BSA perspective, I will treat the customer how they would legally be treated, not the way they want the account setup.
I would just follow the paperwork. Here is New York, when you have XYZ Holdings DBA Apartment Complex, there will be a SoS receipt for assumed name Apartment Complex. If they are XYZ Holdings Inc DBA Apartment Complex LLC just follow the paperwork to understand how the customer has been created. If the customer appears on the SoS website as Apartment Complex LLC....... the XYZ Holdings Inc, is irrelevant, the LLC formed as a separate entity, the customer is just throwing DBA terminology at you not knowing what it completely means.