Before: you make a thing, you stick it in box and mail it to someone in another EU country. Fees paid: postage.

After: for every one of the 27 EU countries you plan to ship to, you must pay hundreds or thousands of euros in registration fees as a packaging producer.

Somehow, regulation believers who think they are sticking it to the big man think this is a reasonable system, and not a complete killer of small time entrepreneurship for those not fortunate enough to have millions in capital.