Recorded first class is what I said, that is correct.
Send the money in whichever way gives you a warm fuzzy glow inside, so long as I don't have any fees to pay on it (or money is included which cover said fees) then I don't really mind.
If you don't have the time to spend 30 seconds looking for an address that has been clearly posted at least once in this thread, then that's your loss I guess.