Many business owners have regretted making a mistake when a commercial locksmith arrived at their business premises in order to fix a problem, such as a safe that had jammed. This article discusses some of those things that you should never do when a commercial locksmith responds to a service call that you have made. Not Providing Your Identification Card Professional locksmiths usually insist on seeing the identification card of the person who has called them to fix a problem in a home or business premises.