Gathering Documentary Evidence: Strategies and Legal Framework

When a criminal case reaches court, the outcome often hinges not just on what witnesses say, but on what documents can prove. A forged cheque, a damning email trail, CCTV footage, or a fraudulent property deed – documentary evidence has the power to establish guilt or innocence with a clarity that oral testimony alone rarely achieves. But collecting and presenting such evidence is far from a simple task. It demands precise legal compliance, procedural discipline, and an awareness of rapidly evolving laws. Here is a closer look at how documentary evidence is gathered, preserved, and presented within India’s criminal justice framework – and how India’s new criminal laws have redefined the rules of the game.

What counts as documentary evidence? 🔗

Under the Indian Evidence Act, 1872, documentary evidence was defined as all documents produced for the inspection of the court. The Bharatiya Sakshya Adhiniyam, 2023 (BSA), which replaced the Evidence Act from July 1, 2024, retains this definition but significantly expands its scope. Under Section 2(d) of the BSA, a document is defined as any matter expressed or described or otherwise recorded upon any substance – including electronic and digital records.

In practical terms, documentary evidence in a criminal investigation spans a wide range of materials. Physical documents include letters, contracts, financial records, diaries, and handwritten notes. Digital records encompass emails, text messages, social media posts, digital photographs, electronic fund transfers, and computer files. Official records include birth certificates, death certificates, marriage licences, medical records, educational transcripts, and property deeds. All of these can be produced before a court as documentary evidence – provided they are collected and authenticated in the prescribed manner.

The governing legal framework 🔗

Three pieces of legislation form the backbone of how documentary evidence is handled in India’s criminal justice system today.

Bharatiya Sakshya Adhiniyam, 2023 🔗

The BSA is the primary law governing the admissibility and proof of evidence. Chapter V of the BSA lays down provisions regarding documentary evidence, and general rules for proving documentary evidence in various cases are dealt with under Sections 56 to 73. One of the most significant changes introduced by the BSA relates to electronic records. Under the old Indian Evidence Act, electronic records were categorised as secondary evidence. The BSA now classifies electronic records as primary evidence and expands such records to include information stored in semiconductor memory or any communication devices such as smartphones and laptops. This is a major shift – it means WhatsApp messages, emails saved on a phone, and data stored on cloud-linked devices can now directly anchor a prosecution without the evidentiary complications that arose under the old law.

Section 63(1) of the BSA provides that any information contained in an electronic record – whether printed on paper, stored in optical or magnetic media, or in semiconductor memory – shall be deemed to be a document and is admissible in proceedings without further proof of the original, provided the conditions mentioned in the section are satisfied. This provision removes much of the technical uncertainty that had previously plagued digital evidence before Indian courts.

Bharatiya Nagarik Suraksha Sanhita, 2023 (BNSS) 🔗

The procedural powers to actually compel the production of documents during an investigation are housed in the BNSS, which replaced the Code of Criminal Procedure. The law regarding processes to compel the production of documents and other movable property is laid down in Sections 94 to 95 of the BNSS, and such processes are of two kinds – a summons and a search warrant.

Section 94 of the BNSS outlines the procedure for courts or police officers to summon individuals to produce documents or items necessary for investigations or proceedings. It allows for the issuance of summons in both physical and electronic forms, and specifies that individuals may comply by providing the requested items without needing to attend in person. This is particularly useful when evidence is held by third parties such as banks, telecom companies, or internet service providers. Critically, unlike the old CrPC’s Section 91, which did not expressly mention digital evidence or electronic communication, Section 94 BNSS now explicitly covers electronic communications and communication devices likely to contain digital evidence – closing loopholes that had earlier complicated investigations involving digital records.

Information Technology Act, 2000 🔗

The Information Technology Act, 2000, and its subsequent amendments encompass provisions relating to the admissibility and legal aspects of digital evidence. The Act offers a legal framework for the collection and use of digital evidence, ensuring that it is admissible in courts and can be utilised effectively in investigations and legal proceedings. In cybercrime cases or matters involving electronic financial transactions, this Act works in tandem with the BSA and BNSS to ensure that digital documentary evidence is handled and presented correctly.

Primary vs secondary evidence: why the distinction matters 🔗

Indian evidence law draws a sharp line between primary and secondary documentary evidence, and this distinction directly affects how an investigator must approach collection.

Primary evidence refers to the original document itself. Courts generally require the original to be produced, since copies may contain omissions or alterations – deliberate or accidental. The Indian Evidence Act required that generally the original should be produced because a copy of the document may contain omissions or mistakes of a deliberate or accidental nature. The BSA maintains this principle for physical documents.

Secondary evidence is used when the original cannot be produced – for example, when it has been destroyed, is in the possession of the opposing party, or exists in a foreign country. Secondary evidence is admissible in conditions such as when the original is a document of which a certified copy is permitted by law to be given in evidence, or when the original consists of numerous accounts or other documents which cannot conveniently be examined in court and the fact to be proved is the general result of the whole collection.

A significant update under the BSA is that the BSA expands secondary evidence to include oral and written admissions, and the testimony of a person who has examined the document and is skilled in the examination of documents. This broadens the tools available to prosecutors when original documents are unavailable.

Step-by-step: how documentary evidence is collected 🔗

The physical act of collecting a document is only the beginning. Legal validity of documentary evidence depends on a methodical process at every stage.

Establishing relevance and securing legal authority 🔗

Before collecting any document, investigators must establish relevance – determining how the document relates to the case – and secure legal authority by obtaining necessary warrants, court orders, or consent forms. Investigators must also document the source, recording where and from whom the document was obtained. Under the BNSS, police officers must issue written orders (physical or electronic) when requiring production of documents. A verbal instruction is not sufficient – courts have held that written orders serve as a procedural safeguard.

Handling, photography, and initial documentation 🔗

The actual collection process must maintain integrity and create a clear chain of custody. This means handling documents carefully using gloves and proper techniques to avoid damage, photographing documents in place (in situ) before removing them, showing where and how documents were found, and maintaining a record of every person who handles the document from collection through to presentation in court.

For digital documents, investigators must use forensically sound methods to extract data to avoid any allegation of tampering. Under the BSA, a certificate is required to prove the authenticity of electronic records. The BSA provides specific formats for certificates needed to prove electronic evidence – a certificate signed by the person in charge and an expert – and the certificate must mandatorily follow the annexed format, building an extra layer of accountability and credibility.

Dealing with third-party holders 🔗

Some of the most critical documents in a criminal case are held by third parties – banks, hospitals, telecom companies, or employers. Investigators often face ethical and legal challenges when documentary evidence is held by third parties like banks, hospitals, or telecommunications companies, which may require specific legal procedures to access. In such situations, a Section 94 BNSS order or summons must be issued. For bank records specifically, the Bankers’ Books Evidence Act, 1891 also applies – bank officers cannot be compelled to produce account books unless a court order is obtained.

Preservation: the chain of custody principle 🔗

Collecting a document means nothing if its integrity cannot be established at trial. Courts scrutinise the chain of custody – the documented trail of every person who handled the evidence, every location it was stored in, and every time it changed hands. A break in this chain can render otherwise compelling evidence inadmissible. For physical documents, this means controlled storage in sealed envelopes with identification markings. For digital evidence, it means maintaining hash values (cryptographic fingerprints) to prove that data has not been altered since collection. Over the years, Indian courts have delivered landmark judgments that have influenced the acceptance and reliance on forensic evidence and have prompted procedural reforms in how forensic evidence is collected, preserved, and presented in court.

Proving documentary evidence in court 🔗

Gathering and preserving a document is only half the battle. It must also be proved in court before it can influence a verdict. Three questions arise whenever a document is produced: whether the document is what it purports to be, whether it was made by the person who appears to have made it, and whether its contents are true. The BSA provides distinct rules for proving public documents versus private documents.

Public and private documents 🔗

Documents are of two kinds – public and private. Section 74 of the (old) Evidence Act, mirrored in the BSA, gives a list of public documents, and all other documents are regarded as private documents. Public documents – such as government records, court judgments, or official registers – can be proved by producing certified copies. Every public officer having custody of a public document must give a certified copy on demand upon payment of legal fees, and such certified copies are called certified copies. Private documents, however, must generally be proved by calling the author or an attesting witness, unless they fall within specific exceptions.

The role of expert opinion 🔗

Where the authenticity of a document is disputed – for example, if a signature is alleged to be forged – expert opinion becomes essential. The BSA allows courts to seek the opinion of experts in handwriting, document examination, and digital forensics. India established dedicated forensic science laboratories (FSLs) to provide a professional and scientific approach to crime investigations, with the first such lab set up in 1952, signifying a commitment to elevating the role of science in legal proceedings. The Central Forensic Science Laboratory (CFSL) and its regional branches are key institutions that examine disputed documents in criminal proceedings.

The documentary evidence landscape under India’s new criminal laws 🔗

India’s three new criminal laws – the Bharatiya Nyaya Sanhita, the BNSS, and the BSA – which came into force on July 1, 2024, collectively represent the most significant overhaul of the country’s criminal justice framework since independence. For documentary evidence, the changes are particularly meaningful. Crime scene investigation in India is now governed by the BNSS and the BSA, with the process involving systematic evidence collection, forensic analysis, and strict adherence to chain-of-custody protocols to ensure judicial admissibility.

One notable procedural change concerns recovery of evidence based on statements made by the accused. Under the new framework, the BSA read with the BNSS requires that seizures must be video graphed – a police officer cannot simply claim that the accused disclosed a location; the recovery must be supported by digital evidence in the form of video, or the statement may be rendered weak or inadmissible. This change directly affects how investigators document the collection process itself, making video recording of search-and-seizure operations a practical necessity.

The reforms also acknowledge the realities of modern crime. The BSA represents a modern and technologically supported legal landscape, shifting towards a modern and digital era by expanding the scope of admissibility and making an effort to clarify and simplify certain provisions. For law students and practitioners, this means the older distinction between electronic records as “secondary evidence” is gone – and the procedural certificate requirements under Section 63 of the BSA are now a critical practical consideration in every case involving digital documents.

Challenges in collecting documentary evidence 🔗

Despite a robust legal framework, several practical challenges persist. Infrastructure gaps between urban and rural areas affect the quality of forensic examination. Investigations are often marred by systemic inefficiencies, including a lack of adequate training, insufficient resources, and outdated forensic practices, with law enforcement agencies frequently facing resource constraints that hinder thorough investigations. Privacy law is another growing consideration – accessing documents held by private parties such as telecom providers or hospitals requires balancing investigative necessity against constitutional rights. Additionally, cross-border digital evidence – such as data stored on foreign servers – requires international legal cooperation that India’s framework is still developing.

What do you think? With the BSA now treating electronic records as primary evidence, does India’s investigative infrastructure – particularly at the district and rural level – have the forensic capability to properly collect and certify digital documentary evidence in compliance with the new law? And as WhatsApp messages and social media posts increasingly appear as documentary evidence in criminal trials, how should courts balance the reliability of such evidence against the ease with which digital communications can be fabricated?

References

1. https://indiankanoon.org/doc/1953529/
2. https://www.indiacode.nic.in/handle/123456789/20063
3. https://www.latestlaws.com/bare-acts/central-acts-rules/bnss-section-94-summons-to-produce-document-or-other-thing/
4. https://www.ijcrt.org/papers/IJCRT2403015.pdf