That's all fine until someone gets pulled up over it. Or someone gets ill.
The game dealer must be fiddling his records, whatever. If he has an EHO inspection they'll expect to see details of every carcass that's come through his hands, including who he bought them from and the "trained hunter" number of the stalker.
I suppose it all depends on what level of risk you're prepared to take. A bit like me carrying a knife at all times - whenever I mention it the doom-mongers on here tell me I'm risking my FAC, but it's a risk I'm prepared to take for the convenience of always having my knife handy, and no-one's pulled me up over it yet.
I wonder if illegal supply of venison also puts one's FAC at risk?