Documents: Definition, Types and Preliminary Examination

The forensic definition that NET asks about lives in Section 2(1)(d) of the Bharatiya Sakshya Adhiniyam 2023, in force from 1 July 2024. It defines a document as "any matter expressed or described upon any substance by means of letters, figures or marks, or by more than one of those means, intended to be used, or which may be used, for the purpose of recording that matter, and includes electronic and digital records". The four illustrations attached to the section are the same ones that appeared under Section 3 of the Indian Evidence Act 1872: writing is a document, words printed or lithographed are a document, a map or plan is a document, an inscription on a metal plate or stone is a document. The BSA 2023 adds the electronic-record inclusion explicitly inside the main clause, which is the single most testable change against the old IEA wording.

The parallel definition in the Bharatiya Nyaya Sanhita 2023 Section 2(8) (replacing IPC Section 29) tracks the same substance. It matters because the BNS forgery and counterfeiting offences (BNS Sections 336 to 347, covering forgery, making a false document, forgery for the purpose of cheating, using forged documents, counterfeit currency) all turn on whether the object in dispute is a "document". A cheque, an Aadhaar print, an FIR copy, a court order, a stamp paper, a railway ticket, a degree certificate, a digital PDF and a WhatsApp message are all documents in the eyes of the law. The historical IPC Section 29 and IEA Section 3 are worth keeping in the answer because NTA still occasionally cites the older sections, particularly for cases decided before 1 July 2024.

The classification NET expects you to reproduce has four legal heads and one practical head.

Public documents (BSA 2023 Section 74). Records of acts of sovereign authority, official bodies and public officers (legislative, judicial and executive) of India and of a foreign country; public records kept in any State of private documents. Examples: FIR, charge sheet, court judgments, gazette notifications, voter rolls, land records (7/12 extracts, RoR), birth and death certificates, passports, Aadhaar enrolment records held by UIDAI, school and university records kept by public universities, and police case diaries. BSA 2023 Section 76 sets the rule that certified copies of public documents are admissible without producing the original.

Private documents (BSA 2023 Section 75). All documents that are not public. Personal letters, partnership deeds, private agreements, sale receipts in private hands, diaries, personal cheques in the hands of a private holder, suicide notes, ransom notes, anonymous threat letters. Proof of execution requires the original, an admission, or attesting-witness evidence under BSA Sections 67 onwards. BSA 2023 Section 77 lists which categories the rules of the chapter apply to.

Electronic records (IT Act 2000 Section 2(1)(t)). Data, record or data generated, image or sound stored, received or sent in electronic form or microfilm or computer-generated microfiche. The admissibility of electronic records is controlled by BSA 2023 Sections 61 and 63 (carrying forward IEA Sections 65A and 65B), which require a certificate covering the device that produced or copied the record. The Supreme Court fixed the procedural shape of this certificate in Anvar P.V. v. P.K. Basheer (2014) and the larger bench in Arjun Panditrao Khotkar v. Kailash Kushanrao Gorantyal (2020). Examples that come into a QD lab: scanned cheques, printouts of WhatsApp messages, email print, e-stamp printouts, digital signatures on PDFs.

Negotiable instruments (NI Act 1881 Section 13). Promissory notes, bills of exchange and cheques payable to order or bearer. Cheques are the workhorse questioned document in Indian QD casework, especially in the volume of Section 138 NI Act cheque-bounce litigation and in cheque-fraud (alteration, forgery of drawer signature) referrals.

A questioned document is any document whose authorship, authenticity, age, sequence of preparation or content is disputed. A known document or standard is a document of established origin set against the questioned one for comparison. The Indian QD examiner divides standards into two collection routes.

Requested standards (exemplars). Taken under controlled conditions in the presence of the investigating officer or a magistrate. The accused or witness writes or signs a dictated text in the same writing instrument, on the same kind of paper, in the same posture, multiple times. The legal hook is BNSS 2023 Section 349 (replacing CrPC Section 311A), which empowers a magistrate to direct any person, including an accused, to provide specimen signatures or handwriting. The Supreme Court in State of UP v. Ram Babu Misra (1980) had earlier held that a magistrate had no such power under the unamended CrPC; Section 311A (added in 2005) and now BNSS Section 349 closes the gap. The same principle was extended to voice samples in Ritesh Sinha v. State of UP (2019).

Collected standards. Drawn from the natural writings of the person before the dispute arose: old letters, bank-account opening forms, signed cheques, school-admission forms, government applications, signed property documents. Collected standards are usually closer to the natural writing habit because the writer was not conscious of being examined. A defensible QD report uses both kinds of standards, ideally 15 to 25 specimens spread across time.

The leading case on the weight of QD opinion is Murari Lal v. State of MP (1980), where the Supreme Court held that there is no rule of law or prudence that the opinion of a handwriting expert must always be corroborated; the opinion can found a conviction if the court is satisfied with its reasoning. The court repeated the caution in State of Maharashtra v. Damu (2000) and again in C. Magesh v. State of Karnataka (2010)

Preliminary examination is the QD division's non-destructive first pass. Run in this order at GEQD Shimla, GEQD Hyderabad, GEQD Kolkata, and at the QD sections of CFSL Hyderabad, CFSL Chandigarh and SFSLs in states such as Maharashtra, Tamil Nadu and Karnataka. The point is to record everything visible before any chemical, electrostatic or instrumental test changes the document.

Step 1: Visual inspection under normal light. The examiner notes the substrate (paper type, weight, dimensions, folds, perforations), the writing or printing instrument family (ballpoint, gel, fountain, pencil, laser, inkjet, dot-matrix, stamp pad), the language and script, the layout, and any obvious alterations, erasures, additions or staining. The exhibit is photographed at this stage with a scale, using a copy stand or a forensic camera.

Step 2: Oblique (raking) light. A light source held at a low angle (5 to 15 degrees from the page) brings out indented (latent) writing, embossing, intaglio printing on currency and stamp paper, surface disturbance from erasures, and pressure-traced signatures. Oblique light is the cheapest and one of the most diagnostic steps in the workflow.

Step 3: Magnification under a stereoscopic microscope. Examiners work at 4x to 40x with a stereo-zoom microscope, sometimes pushed to 100x on a compound microscope for ink-line detail. The microscope reveals stroke direction, pen-lift, line-quality tremor, retouching, ink colour layering, hesitation marks, and toner versus liquid-ink characteristics. CFSL and SFSL benches typically use Leica, Nikon, Olympus or Zeiss stereo microscopes.

Step 4: Transmitted light. The document is held over a light table or backlit panel. Watermarks become visible (currency notes, security stamp paper), security threads appear, fibre distribution and chain lines in laid paper show, and erasures or splices in cheque amount panels stand out as thinning of the substrate.

Step 5: UV and IR examination using a VSC. A Video Spectral Comparator (VSC) such as the Foster + Freeman VSC 6000 or VSC 8000 is the workhorse instrument in Indian QD divisions. UV at

A questioned document arrives at the laboratory through a forwarding letter from the investigating officer under BNSS 2023 Section 176 (investigation) read with Section 349 (specimen handwriting and signature). BNSS 2023 Section 349 (replacing earlier CrPC Section 311A) is also the route through which specimen handwriting or signatures are obtained for comparison. The forwarding note lists each exhibit with its FIR number, section of law, the question put to the examiner ("is the signature on Exhibit Q1 written by the person who wrote the signatures on Exhibit S1 to S10?"), and the seizure memo.

Packaging rules for QD exhibits differ from biological and chemical exhibits. Documents are never folded along a writing line, never stapled through writing, never placed in plastic sleeves that can lift fresh ink, and never exposed to direct sunlight or high humidity. Each exhibit is placed between two clean sheets of plain paper, slipped into a kraft envelope, sealed with the IO's seal, and labelled with the exhibit number, FIR number, date and the words "questioned document, do not fold, do not staple". Wet documents are first air-dried in a clean, dust-free area before packaging.

The chain of custody for a QD exhibit follows the same general principle as any forensic exhibit, with a paper trail from seizure memo to malkhana register to forensic-receipt register to bench register to report despatch. The legal frame is BSA 2023 Section 39 (expert opinion) for the admissibility of the QD examiner's report, and BNSS 2023 Section 348 (replacing CrPC Section 293) for the inclusion of certain government scientific experts whose reports may be admitted without calling the expert in court. For a deeper treatment of how this paper trail is constructed and defended, see the chain of custody topic and the broader Bharatiya Sakshya Adhiniyam 2023 framework for forensic evidence in court.