Legal Question in Business Law in California

999 times out of 1000, the cops will be too busy with serious crime to respond to a citizen complaint about a business operating without a license. Indeed, in many cases failing to obtain a required license may be a civil or administrative breach without violating any criminal statute. Cops do have the power and duty to act in only a very limited range of civil matters. I think the proper entity to which to report lack of a license would be the licensing agency itself. My answer would be different if there were something else illegal about this business, e.g., it is engaged in gambling, bootlegging, etc. Finally, I don't think the fact that a business lacks a name is significant at all. My law practice is a business, but it doesn't have a name.

I agree with Mr. Whipple's answer 100%. Report them to the agency issues business licenses for that city or profession.