Expert Opinion vs Opinion of a Person Acquainted with Handwriting under the Bharatiya Sakshya Adhiniyam, 2023: Section 39(1) and Section 41(1) Compared

Two witnesses may tell a court that a document was written by a particular person, and neither of them saw it written. One is an expert who has never met the writer and compares the disputed writing against standards. The other has never studied the subject but knows the writer's hand as he knows his voice. The Adhiniyam admits both, under different sections and on entirely different footings, and the difference between them decides how each is proved, tested and weighed.

1. The Two Provisions

Section 39(1), BSA — Opinions of experts

When the Court has to form an opinion upon a point of foreign law or of science or art, or as to identity of handwriting or finger impressions, the opinions upon that point of persons specially skilled in such foreign law, science or art, or in questions as to identity of handwriting or finger impressions, or in any other field, are relevant facts. Such persons are called experts.

Section 41(1), BSA — Opinion as to handwriting, when relevant

When the Court has to form an opinion as to the person by whom any document was written or signed, the opinion of any person acquainted with the handwriting of the person by whom it is supposed to be written or signed, that it was or was not written or signed by that person, is a relevant fact.

Explanation. — A person is said to be acquainted with the handwriting of another person when he has seen that person write, or when he has received documents purporting to be written by that person in answer to documents written by himself or under his authority and addressed to that person, or when, in the ordinary course of business, documents purporting to be written by that person have been habitually submitted to him.

The two sections do not compete. They admit different witnesses, giving different kinds of opinion, on the same question. A party may call one, the other, or both, and where the two conflict the court resolves the conflict on the ordinary principles.

2. The Fundamental Difference

The distinction is between skill and familiarity, and everything else follows from it.

The expert is qualified by training and practice in the comparison of writings. He does not know the writer and has no impression of his hand. What he does is place the disputed writing beside known standards and examine specified features — letter formation, slant, spacing, pen pressure, connecting strokes, line quality — applying criteria the discipline recognises. His conclusion is the product of a method, and it stands or falls with the method.

The acquainted person is qualified by exposure. He has seen the writer write, or has corresponded with him, or has received his writings habitually in business. He recognises the hand the way anybody recognises a familiar face or voice, without analysing why. His conclusion is the product of experience, and it stands or falls with the extent and quality of that experience.

⚠ The acquainted person is not an inferior expert

It is sometimes suggested that the acquainted person gives a weaker version of what the expert gives. He does not — he gives something different in kind. He is not attempting a comparison and cannot be criticised for failing to identify characteristics, because identifying characteristics is not what he is doing. The proper cross-examination of an acquainted person is directed at how well he knows the hand; the proper cross-examination of an expert is directed at how he reached his conclusion. Confusing the two produces cross-examination that misses in both directions.

3. The Foundation Each Must Lay

Neither witness may give his opinion until a foundation is laid, and the foundations are entirely different.

3.1 The expert's foundation

The expert must be shown to be specially skilled. This is established in examination-in-chief by taking him through his training, his experience, the number of comparable examinations he has conducted, and any qualification or standing in the discipline. The section requires no degree, and skill acquired by long practice is sufficient, but something must be shown.

Where no foundation is laid, the opinion is not receivable at all. This step is skipped with surprising frequency: a report is exhibited, the author is examined on his findings, and nobody establishes that he was competent to make them. The point is available in argument and, when taken, the evidence collapses.

3.2 The acquainted person's foundation

The Explanation to Section 41(1) is exhaustive of the ways in which acquaintance may be acquired, and this is the single most important practical point about the section. Three modes are recognised and no others.

He has seen that person write. How often, over what period, and in what circumstances are matters of weight, but the fact of having seen the writer write is the classic foundation.
He has received documents purporting to be written by that person in answer to documents written by himself or under his authority and addressed to that person. This is the correspondence route, and its logic is that a reply to a letter one has sent is very likely to come from the addressee.
In the ordinary course of business, documents purporting to be written by that person have been habitually submitted to him. This is the business route — the manager who receives a clerk's daily returns, the bank official who handles a customer's cheques.

A witness who says only that he is 'familiar with' the handwriting, or that he has 'often seen it', without bringing himself within one of these three, has laid no foundation. His opinion is not merely weak; it is outside the section.

4. The Comparison

	Expert — Section 39(1)	Acquainted person — Section 41(1)
Qualification	Special skill in the comparison of writings	Acquaintance with the particular writer's hand
Knows the writer?	No, and need not	Yes, in the sense the Explanation defines
Basis of the opinion	Comparison against standards, applying recognised criteria	Recognition founded on familiarity
Foundation to be laid	Training, experience and demonstrated skill	One of the three modes in the Explanation, which is exhaustive
Must give reasons?	Yes. A bare conclusion is of no assistance	No. He is not expected to analyse what he recognises
Standards required?	Yes — adequate, contemporaneous, comparable	No
Cross-examined on	Method, standards, characteristics compared, differences observed, alternatives excluded	Extent and recency of acquaintance, opportunities of observation, interest in the outcome
Weight	Depends entirely on the reasoning; treated with sustained caution	Depends on the extent of familiarity; can be very strong where familiarity is long and close
Availability	Any party may retain one	Only where a person with the requisite acquaintance exists and is willing

5. Weight

It is a common assumption that the expert's opinion is the stronger of the two because it is scientific. Indian courts have not taken that view, and the case law on handwriting expertise is markedly more cautious than on any other named discipline.

📖 Magan Bihari Lal v. State of Punjab, (1977) 2 SCC 210

Held: It is unsafe to base a conviction solely on the opinion of a handwriting expert. Such opinion evidence is of a frail character and is hedged about with a great many uncertainties. Before acting upon it, the court must seek independent and reliable corroboration.

Ratio: The classical statement of the caution with which expert handwriting opinion is treated.

📖 Murari Lal v. State of Madhya Pradesh, (1980) 1 SCC 704

Held: There is no rule of law, nor any rule of prudence which has crystallised into a rule of law, that the opinion of a handwriting expert must never be acted upon unless substantially corroborated. But the imperfections of the science and the risk of error are such that the approach should be one of caution, and the reasons for the opinion must be carefully probed and examined. Where the reasons are convincing and there is no reliable evidence throwing doubt on them, there is no reason to distrust the opinion.

Ratio: No absolute rule, but everything turns on the reasoning offered.

The acquainted person attracts no comparable body of caution, and in ordinary civil litigation his evidence is frequently the stronger. A partner who has handled his colleague's writing daily for twenty years, or a clerk who has processed a customer's cheques for a decade, gives an opinion resting on a volume of exposure no expert could match, and courts have acted on such evidence without hesitation.

What weakens the acquainted person is interest. He is almost always connected with one of the parties, and his recognition may be coloured by what he expects. The expert's advantage is precisely that he has no stake and no prior impression, and where the acquainted witnesses on the two sides contradict each other, the expert's method may be the only means of resolving the conflict.

6. When the Two Conflict

Where an expert says the writing is not the accused's and an acquainted witness says it is, the court must decide, and the decision is made on the ordinary principles rather than by any rule of precedence.

The matters that decide it are, in substance, four. Whether the expert's reasoning survives, since an opinion that identifies the characteristics and addresses the differences is far more persuasive than one that does not. Whether the expert had adequate standards, since an opinion founded on two non-contemporaneous signatures is weak whatever its confidence. Whether the acquainted witness's familiarity is genuine and recent, and falls within one of the three modes. And whether either witness has an interest in the outcome.

A third route is available where the conflict cannot otherwise be resolved.

Section 72, BSA — Comparison of signature, writing or seal with others admitted or proved

In order to ascertain whether a signature, writing or seal is that of the person by whom it purports to have been written or made, any signature, writing or seal admitted or proved to the satisfaction of the Court to have been written or made by that person may be compared with the one which is to be proved.

The Court may direct any person present in Court to write any words or figures for the purpose of enabling the Court to compare the words or figures so written with any words or figures alleged to have been written by such person.

This section applies also, with any necessary modifications, to finger impressions.

📖 State (Delhi Administration) v. Pali Ram, (1979) 2 SCC 158

Held: The power under the provision corresponding to Section 72 is exercisable by a court in a proceeding before it, for the purpose of enabling the court to compare the writing with a writing already before it. The section does not confer a general power to require specimen writings for the purposes of investigation. Although a court is competent to compare writings itself, it should ordinarily be slow to base a finding on its own comparison alone, and should seek the assistance of an expert where the question is genuinely contested.

Ratio: Section 72 is a trial power, and judicial comparison alone is an unsafe foundation for a finding.

The practical effect is that Section 72 supplements the other two routes rather than replacing them. A court may look for itself to test an expert's reasoning, or to confirm what is obvious, but should not decide a genuinely contested question by its own inspection alone.

7. Where Each Is Used

The two routes are not distributed randomly across litigation, and knowing which is likely to be available shapes how a case is prepared.

The acquainted person predominates in ordinary civil disputes — suits on promissory notes, cheques and receipts, disputes about letters and correspondence, and questions about entries in account books. In these settings somebody almost always knows the hand: a partner, an employee, a bank official, a family member. Calling him is cheaper, faster and frequently more convincing than retaining an examiner.

The expert predominates where no acquainted person exists or where those who exist are interested. Forged wills, disputed deeds executed decades earlier, anonymous documents, altered records and cases where the writer is dead all fall into this class. He is also indispensable where the question is not merely whose hand it is but whether the document has been altered, interpolated or written at different times — questions of ink, sequence of strokes and indented writing that no acquainted person can answer at all.

⚠ The expert can answer questions the acquainted person cannot

The comparison between the two provisions is often framed as though both witnesses answered the same question. They do only when the question is authorship. Where the issue is whether an interpolation was made later, whether two portions of a document were written with different pens, whether a signature was traced, or whether a page was substituted, the acquainted person has nothing to contribute and the examiner is the only route. In such cases the caution expressed in Magan Bihari Lal has considerably less force, because those questions turn on physical examination rather than on the judgment of similarity.

8. Two Related Points

Obtaining specimen writings. Section 72 permits a court to direct a person present in court to write for comparison, but it is a trial power. For investigation, the express provision carried forward in the Bharatiya Nagarik Suraksha Sanhita, 2023 empowers a Magistrate to order specimen signatures or handwriting — a power inserted after State of U.P. v. Ram Babu Misra, (1980) 2 SCC 343 held that no such power existed and invited the legislature to supply one.

Article 20(3) is not attracted. Furnishing a specimen writing conveys no personal knowledge and is identificatory rather than testimonial, and the protection against self-incrimination therefore does not extend to it — the position settled in State of Bombay v. Kathi Kalu Oghad, AIR 1961 SC 1808.

Electronic signatures stand differently. Section 41(2) provides that where the court has to form an opinion as to the electronic signature of a person, the opinion of the Certifying Authority which issued the Electronic Signature Certificate is relevant. That is neither expert opinion in the Section 39 sense nor acquaintance in the Section 41(1) sense; it is the opinion of the body that issued the credential, and it has no counterpart in the world of pen and paper.

9. The Position Stated Shortly

The two sections admit different witnesses, qualified by skill and by familiarity respectively, and neither is a version of the other.
The Explanation to Section 41(1) is exhaustive. A witness must bring himself within one of the three modes, and a claim of general familiarity will not do.
The expert must give reasons; the acquainted person need not. The expert's opinion is the product of a method, and is worth what the method is worth.
The expert requires adequate standards, contemporaneous and comparable, and an opinion founded on inadequate standards is weak however confidently expressed.
Courts treat expert handwriting opinion with sustained caution — Magan Bihari Lal — but there is no rule requiring corroboration — Murari Lal.
The acquainted person is frequently the stronger witness in ordinary civil litigation, subject to the question of interest.
Section 72 supplies a third route, but it is a trial power and judicial comparison alone is an unsafe foundation — Pali Ram.
The expert alone can answer questions of alteration, interpolation and sequence, and in that field the usual caution has much less force.

10. Related Topics and Provisions

Topic or provision	Connection
Handwriting Expert Evidence	The expert route in detail, including standards and lines of attack
Expert and Opinion Evidence — Sections 39 to 45	The statutory scheme in full
Nature and Evidentiary Value of Expert Evidence	The advisory character of expert opinion and the requirement of reasons
Fingerprint Evidence	The other discipline named in Section 39(1), and the parallel power under Section 72
Section 41(2), BSA	Opinion of the Certifying Authority as to an electronic signature
Section 72, BSA	Comparison by the court, and the power to direct a person present to write
Sections 40 and 45, BSA	Facts bearing on an expert opinion, and the grounds of the opinion
Confession and Article 20(3)	The line between testimonial and identificatory material