This is true, ViaMat (Loomis) and other provides this service commercially, however unless you have very secure storage on the receiving end you are basically asking to be attacked by declaring large sums in cash or valuables in many locations around the world ... and not only by the taxman, off-duty costoms officers and policemen will be looking to take care off your valuables.No seriously, there is nothing illegal about transporting cash if you declare it.