&gt; Because they don&#x27;t want to do business with a criminal.<p>I don&#x27;t either, most of the time.  But verifying a certificate is the equivalent of checking someone&#x27;s ID to make sure the name matches the face.  It doesn&#x27;t tell me whether someone is a criminal, nor do I expect it to.  If it&#x27;s that important to me, I&#x27;ll check their ID and then head to the county courthouse to check public records before agreeing to anything.  Whether someone is a criminal, what kind of criminal, and how recently are both too much data and too perishable and uncertain to put on someone&#x27;s ID card.  Which is why that&#x27;s not done in most (any?) jurisdictions.