Hmmm, when dealing with the IRS I recommend you rely on what you read (assuming they wrote it). Prior to 2013, you were not required to file information returns on properly documented NRA's other than Canadians, so I cannot imagine why someone plugged in fake TINs to begin with.
If you have NRA's conducting reportable cash transactions use their TIN from their "home" country. It will work on the CTR. There is also a place for it on the 1042S. Do not put it in any box labeled for a U.S. TIN.
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In this world you must be oh so smart or oh so pleasant. Well, for years I was smart. I recommend pleasant.