NDL certainly does not mind, and in fact, even encourages the use of this site for research material. The reader is hereby cautioned, however, that much of the materials found here are copyrighted by NDL. As such, this site (or NDL) should be referenced in such bibliographies as are occasioned by books, articles, research papers, lectures, and the like. The suggested bibliography should be in the form of:

Norwitch, Frank Harley. Norwitch Document Laboratory. “(Specific page titles).” Online. Available http://www.questioneddocuments.com. (Date you accessed site).

Thank you for your considerations. If you have any questions concerning this, please contact us.


Selecting the Expert                                        Indented Writing Retrieval

Ethics & the Expert                                          Typewriter & Typewriting Examinations

The Forensic Document Laboratory                     Paper & Watermark Examinations

Handwriting Theory                                         Rubber Stamps   

Handwriting Standards & Disguise                Miscellaneous Examinations

Signatures & Forgery                                      Questioned Document Opinions

Original Ink Determination                              Court and the Document Examiner

Photocopy & Photocopier Examinations        Landmark Legal Opinions

Photocopy Forgery                                         Recommended Reading

Alteration/Obliteration & Ink Examinations