To be on the safe side.
I can be the intermediary. You forward that information to me, and I'll tell the guy I have it. He can then have me follow the instructions for you.
That way he won't get your financial information. You're safe. Only I will have it. Just me. And I won't send it to anyone else.
And for compensation I'll rely upon your generosity. Nice guy that I am. Contrasted with that guy, you know where to find me - right here.
Arf :-)