If tainted coins are the problem he would have a problem with the exchange as well.
But he stated that he has no issues with his account at the exchange where
the funds were coming from.

I´m really curious which 3rd party Fairlay is talking about here. Given the fact that
Fairlay is not licensed anywhere in the world I don´t really understand why they would
work with a company like Chainalysis (I suspect that the 3rd party that they talk
about is one of these blockchain analytics companies).