Advanced Questioned Document Examination

How a forensic document lab handles a case from start to finish · reading a request and planning the examination in the right order · case notes and records · quality standards (ISO 17025 and NABL) · how GEQD, CFSL and State FSLs work in India · collecting specimen handwriting legally.

Using the VSC with UV and infrared light · telling apart two inks that look the same · finding later additions, erased writing and correction fluid · reading scratched-out or covered writing · taking clear, repeatable images for court.

Testing inks with thin-layer chromatography (TLC) · how paper and printer toner are analysed in the lab · finding which of two crossing lines was written first · how forgers make documents look old, and how to catch it · why the age of ink cannot be reliably fixed.

Using ESDA to recover writing pressed into the page below · checking whether notebook or statement pages were written in order · examining rubber stamps and seals · spotting fake, printed or scanned stamp impressions.

Very short and simple signatures · people who disguise their own signature to deny it later · writing of elderly or ill persons · signatures on photocopies and digital signature pads · handwriting in Hindi, Kannada, Tamil, Telugu, Malayalam and Urdu · people who write in more than one script.

Identifying how a document was printed · linking a print or photocopy to a machine · hidden yellow tracking dots from colour printers · typewritten documents · checking whether the font and layout fit the claimed date.

Preserving a digital file and checking whether it was changed · reading hidden file details (metadata) in PDFs and Word files · verifying digital signatures · spotting edited and AI-made documents · the law on electronic evidence (BSA Section 63 and the IT Act).

Security features of Indian currency notes · stamp papers and e-stamps · CTS-2010 cheques · passports, e-passports and Aadhaar QR codes · fakes made using genuine machines or paper.

Safe handling of damaged documents · reading burnt paper with infrared light · drying and separating wet documents · matching torn pieces and rebuilding shredded paper · giving an honest estimate of what can be recovered.

How often document examiners get it right (recent research) · how bias can affect results, and how to avoid it · wording conclusions correctly · writing a full expert report · facing cross-examination in court · final case report and viva.