Suppose I'm an online shop owner who sells knives, but I don't have the means to learn the law of other countries.
Now suppose someone buys a knife from me, but the type of knife is illegal to own where he lives. Can I be punished for shipping the product into his country? If yes, will I receive a fine, get a criminal record, or it's just simply the product could be seized by customs? If it is seized by customs, do I have to refund the buyer?