[soco]

There are containers for recyclables where you personally dump your bags brought along, so there's no bag for the municipality to check. You maybe mix this up with the fine for using non-fee garbage bags? The only check they can do is when looking at your recycled paper stack whether it has also cartons, then they'll leave it on your roadside (and if you're around they'll also tell you why). But that's hardly noteworthy.

In any case, Swiss shops are starting to take in also the new category of "non recyclable plastics" as in non-PET wrappings/recipients/tetrapack/anything. No idea where those go though, I never thought to check if they're burnt or exported.