The private investigator-private detective agency referral registry helps you to locate a professional private investigator anywhere worldwide. It is simple. Choose a country and a factual listing of the single preferred private investigator-detective agency in that country will appear. We only list one private investigator for each country with the exception of the United States where investigators are listed by state and the United Kingdom by region. All private investigators that appear represent themselves as being licensed (where required) and insured.