The easiest way to determine if an instructor was trained by an OSHA Training Center is to just ask the trainer which Training Center they are with. Or, you can ask to see his/her trainer card, it should have the name of his/her host training center. You can then contact the Training Center to ask if the trainer is one of theirs. Here is a link to a map with the Training Centers with contact info.https://www.osha.gov/dte/edcenters/map.htmlosha10hour homepage enlarged