The only thing I have been told, by my Postmaster, that was illegal in shipping knives, was when I ask about shipping one to Switzerland, she said it was illegal, because it was a weapon. After contacting the Swiss Embassy, They said it was ok to ship it, just claim it as it is on the customs slip. We will find out in about nine months, when I go to ship it to the customer. In all fairness to the Postmaster, she did ask someone higher up before giving me her answer, so they don't even know everything.