By his own admission, richatom has told us that he has hired an aircraft and provided his services as a pilot. (ie illegal PT.) He is just trying to hide behind the '2 invoices' scam.
Yes, I now realise that on some occasions last year when I hired the plane myself, paid for the hire myself, then sent an invoice to the client (at the written request of the client - they wanted it that way), that this was illegal. Hence I have been asking on here to clarify the situation, and I won't be doing it that way again.
However, on the majority of the occasions the aircraft operator sent the invoice directly to the client, and I provided pilot services for free, which we have now established is the correct and legal way to operate, and is what I will be doing in the future.
There is no such thing as a "2 invoices scam". It is not a scam, because it is legal to operate in that way.