Katherine Koppenhaver, Certified Forensic Document ExaminerCertified Questioned Document Examiner

Forensic Document Examiners is dedicated to providing professional forensic services in the field of questioned documents. We work with attorneys, district attorneys, public defenders, police departments, investigators, banks, insurance companies, and other private entities, providing a wide range of document related services.

Katherine Mainolfi Koppenhaver

Forensic Document Examiners principal, Katherine Mainolfi Koppenhaver, is a Certified Questioned Document Examiner, Diplomate with more than 40 years of experience, and a published author.

Our qualified staff provide document-related services:

  • Authentication of documents through handwriting comparison
  • Comparison of typewritten and computer-generated documents
  • Identification of altered documents including photocopies
  • Determination of line sequence and indented writing
  • Identification of inserted and substituted material
  • "Reading" under whiteout or other obliterated material

In a wide variety of questioned document cases:

  • Counterfeit documents and forged checks
  • Fraudulent wills and signature identification
  • Anonymous letters and synchronous writing
  • Medical malpractice

In addition, we provide the following services:

  • Expert testimony • Exhibit preparation • Micro-photography • Research & Consulting

Forensic Document Examiners has the ability to handle any size case in a timely manner. Learn more about how we handle your case.