@Brian Freytag It's hard to know if this would exactly solve your issue, since I may be missing something about the implementation, but perhaps adding a custom Transaction Body field for whatever Customer identifier you want. You might have to make it a List/Record and then first populate those values in a List, then set them on the Transaction. Our company uses an approach like this on Sales Orders, both on the Body and Line levels, so that we can relate the transactions to values in an external system, though we use ODBC & Restlets instead of SuiteTalk, so you'd have to test to see if it will work in SuiteTalk for you or not.