http://status.nowherejezfoltodf4jiyl6r56jnzintap5vyjlia7fkirfsnfizflqd.onion/opsec/haveno-cashbymail/index.html
And there are also a few steps that the monero seller (Alice) has to follow in order to make sure the trade is conducted in a secure manner: If you're selling...
Make a video of receiving and opening the package
Record yourself receiving the package from the postal worker, the postal worker weighing it, record the label, all the outer sides of the package; open the package while filming with the camera pointed into it, run the cash through a counter and counterfeit...