Professional Affiliations


Insurance Investigation

Private Investigation

If you are serious about your results, we are your finest choice.


Notary Public
License #2120101

J. Koerner Investigations is fully-authorized to notarize signatures on important documents within the State of California.

While there is no State of California website available to verify licensure online, you can contact the Secretary of State for full disclosure information. We are also featured on

J. Koerner Investigations
P.O. Box 4186
San Dimas, CA 91773
Tel: (909) 225-5448
Fax: (909) 267-9760