Private Investigators serve a useful need to society and are successful career professionals with enviable pay and an exciting profession. There are all kinds of investigation cases that a private investigator receives and most of that will be detailed here in this article. But it is important to remember that at times he may be approached for a case that he is not qualified to handle. Rather than making false promises to resolve the case a good private investigator will deny taking it up.
 A good private investigator knows when to turn down a case and when to direct a client to a fellow investigator. Most private investigators specialize in a particular aspect of investigation which makes them an expert in their domain.
The duties of private investigators may vary from case to case. For instance if an investigator is working on a case related to fraudulent workers compensation claim, he may be required to conduct extensive observation of the subjects. Now, if he figures out that the injuries mentioned in a compensation claim are false then he will have to collate evidences to prove the same.