Is it legal to hire a private investigator in Texas? A Private Investigations company must have an active license in order to conduct business within the state of Texas. Related posts: How do I get a copy of my nursing license? How do I register an out of state business in Texas? How to Become a Level 3 Security Guard in Texas How much is a Splunk license? Como registar um negócio fora do estado no Texas? Can a private operating foundation be a 501c3?