Look, other than sending cash (and the post office collects all address to and from..) you have a trail. Fuck it, use my debt card. Nothing fishy comes up, nothing happens. Tens of thousands of us do this all the time. I can't be bothered by extra fees, odd methods of payment, and general inferior methods of sending money. Being cautious is one thing (and I recommend it), but if someone was "out to get you" or are concerned about "leaving a trail", you've failed already because you are on a cannabis board.