I believe (and its just a guess) that it has to do with the Office of Foreign Asset Control's enforcement of various sanctions programs, as i think it is illega

I believe (and its just a guess) that it has to do with the Office of Foreign Asset Control's enforcement of various sanctions programs, as i think it is illegal to do any business with Cuban nationals as a financial institution (and North Koreans as well?) it could also be a in relation to FACTA or KYC.