The key line is intent. If you create a new type of leather wallet that just happens to be used for money laundering, that is not a crime. If you create a new

The key line is intent. If you create a new type of leather wallet that just happens to be used for money laundering, that is not a crime. If you create a new type of leather wallet specifically designed with the goal so that it's easier to smuggle stuff, you can and should be charged for aiding and abetting if they can convince the jury that you did this knowingly with this intent. If you do the latter and simply want to claim that it just so happened without your intent, well, the courts are there to resolve this dispute, but it can go both ways - especially as soon as there's teamwork and some record of communications, there's often evidence to support or contradict claims of intent. Like, if you made tests where you run your new wallet through various popular models of airport scanning machines testing whether they succeed at detecting something hidden, and advertise the specific airports which do/don't detect it, that would be some evidence about your likely intent.