How do I know parts are not counterfeit?

Detecting a counterfeit part can be challenging at times. A few steps are necessary to identify counterfeit parts. We do some testing such as swab tests, confirm markings with manufacturers, check packaging, and if need be we will do complete testing with a third party test house.  It is always best to look for and work with a reputable vendor that has been in the market for a long time and has good references. We do a company background check before taking chances.