I haven't actually gotten results back from any pen people but for all the other products, I have been going to the manufacturer's website then looking at the tiny links on the bottom for something along the lines of "legal" or "certificates" or if all else fails I use the contact information to email somebody at the company. Most have gotten back to me, quite a few have certificates posted. Then you just have to make sure whatever "certificate" they give you actually gives results/says they passed - some have certificates that say it is currently being tested, or that they don't have to test...just be persistent. Oh,and post back if you find a compliant pen! :-)