Features & Benefits of our Private Detective Training Correspondence Courses


Over 600 pages of the most up-to-date, hands-on private detective training available anywhere

The world's oldest and largest school at the lowest price possible. Choosing a quality detective training course is a major decision. To help you make that decision, read what some of our students are saying about us. Comparing programs is important. Investigate before you invest. Your future depends on it.

Only Global's home study detective training correspondence courses offer you all this:

A Respected Diploma

Electronic Equipment Catalog

43 Lesson Course

Association Membership

Surveillance Video

Money Back Guarantee

Cassette Training Tapes

Lowest Cost / No Hidden Charges!


You will be trained by working professional investigators on real cases, with proven, quick, and guaranteed results. You save up to 60% from other schools' fees and will get the largest, most detailed course available anywhere.

Discover what Global's private investigation training correspondence courses can do for you:



No Investigation Experience or License Needed.

With our correspondence courses, you can learn easily at home for an exciting, profitable, full or part time private investigation career. Start your own detective agency or work for other private detectives or major companies. Global School of Investigation will show you how with step-by step instructions that will help you become an expert investigator in 30 days or less.

If you have ever dreamed of being a private investigator this is your chance to make that dream come true. If you follow our instructions in Lesson 1, you could be working before you finish your course!

You Can Spend More, But You Cannot Get More.

CLICK HERE for Prices & Enrollment
in our private eye correspondence course. Available as an online course!


Excerpts from the true story of Ed Ciriello, private eye and founder of the Global School of Investigation.


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