The volume of domestic mail in most countries is huge, it's prohibitively expensive to check all packages. International packages from suspect countries (e.g. T

The volume of domestic mail in most countries is huge, it's prohibitively expensive to check all packages. International packages from suspect countries (e.g. The Netherlands) might be checked more frequently. As far as I understand, in the case something is caught by customs it's possible to just deny you ever ordered anything and I doubt law enforcement or customs would bother taking it any further unless it was a huge amount, they'll incinerate it and move on.