National Investigations in based on the belief our client’s needs and satisfaction are number 1. We also guarantee confidentiality and professionalism. If you don’t believe us, view our testimonials. Our Manhattan private investigators have been handling cases for over 25 years. Services include both high profile and private client services and are not limited to matrimonial infidelity, identity theft, and computer forensics. We are also available to help with corporate investigations, which include surveillance, sexual harassment claims, personal injury, background checks, corporate espionage, accident investigations and many more. Our goal and mission is to provide care for you and your issue on a personal level, which is why we are proud of our 99% success rate in solving cases, 100% confidentiality policy, free consultation offer and reasonable pricing. If you suspect a spouse is cheating, are unable to locate a loved one, need help with a corporate investigation, or one of our other services our private investigators in Manhattan today!