The Texas Department of Licensing and Regulation actively pursues illigitmate, unlicensed contractors.  To quote from a recent press release:

TDLR encourages the public to verify whether an individual is licensed with TDLR prior to hiring the individual to perform any air conditioning work or electrical work. In addition, TDLR encourages the public to report activity of unlicensed individuals working in the air conditioning industry or the electrical industry so the agency may take appropriate action. Contact TDLR at 1-800-803-9202 or by email at This e-mail address is being protected from spambots. You need JavaScript enabled to view it .¹

You may also use this online form if you have been victimized or solicited by an unlicensed contractor: http://www.license.state.tx.us/Complaints

¹Full text of quoted press release at http://www.license.state.tx.us/PressReleases/judgment-against-timothy-brock.htm