As the EU tightens its rules on CBD and vaping products, third-party testing is becoming the norm rather than the exception. What used to be a niche concern for savvy shoppers is now a standard expectation.

Sooner or later, you'll see more suppliers flaunting their COAs as a selling point. That's a good thing. But it also means more noise—and more opportunities for bad actors to fake it. The questions above will help you separate the real from the bunk.