Legitimacy & Paternity: Section 116 BSA vs. DNA Evidence

The Presumption of Legitimacy: Successive Marriages, DNA Evidence, and the Limits of Legal Fiction

There is perhaps no area of the law of evidence that more vividly illustrates the tension between legal presumption and biological reality than the doctrine of legitimacy. The foundational provision — Section 112 of the Indian Evidence Act, 1872, now re-enacted with a minor but significant textual improvement as Section 116 of the Bharatiya Sakshya Adhiniyam, 2023 (BSA) — has for over a century served as the guardian of children born within wedlock, shielding them from the stigma of bastardy. But as the two problems before us demonstrate, the section's operation is neither simple nor uniform, and its encounter with modern science has generated some of the most profound judicial debates in Indian evidence law.

The Governing Provision

Section 116 of the BSA (corresponding to Section 112 of the Indian Evidence Act) declares:

"The fact that any person was born during the continuance of a valid marriage between his mother and any man, or within two hundred and eighty days after its dissolution, the mother remaining unmarried, shall be conclusive proof that he is the legitimate child of that man, unless it can be shown that the parties to the marriage had no access to each other at any time when he could have been begotten."

It is worth noting that the BSA has substituted the word "child" for "son", a welcome modernisation that makes the provision gender-neutral. The underlying principle, however, remains the same — it is anchored in the ancient Latin maxim pater est quem nuptiae demonstrant: he is the father whom marriage indicates.

The section operates through two interlocking parts. The main part raises a conclusive presumption of legitimacy upon proof of birth during valid wedlock. The non-access part carves out the only method of displacing that presumption — by proving that the parties to the marriage had no access to each other at the time when the child could have been begotten. Access, as settled by the Privy Council in Karapaya Servai v. Mayandi (AIR 1934 PC 49) and affirmed by the Supreme Court in Chilukuri Venkateswarlu v. Chilukuri Venkatanarayana (AIR 1954 SC 176), means not actual sexual intercourse, but merely the opportunity for marital intercourse.

Problem I: The Case of Successive Marriages — Who is Z's Legal Father?

Unravelling the Timeline

Let us examine the facts with precision. P was the wife of X. X died, and two months after his death, P married Y. Five months after the marriage to Y, a son Z was born. The question is: who is the legal father of Z?

The total time from X's death to Z's birth is seven months (two months before remarriage + five months after). The critical question under Section 116 of the BSA is: at the time Z's birth took place, within which marriage did it occur?

Z was born during the continuance of P's valid marriage with Y. The section's main part is therefore squarely satisfied with respect to Y. Birth during a valid subsisting marriage is the decisive criterion — the section, as the Supreme Court noted in Palani v. Sethu (AIR 1924 Mad 677), looks to the date of birth, not the date of conception.

The Problem of Turbatio Sanguinis

One might immediately object: could Z have been conceived during P's first marriage with X? X died two months before P's marriage to Y, and Z was born five months after that marriage. The total gestation period from Z's birth back to the time of P's marriage with Y is five months. Working backwards further — seven months from X's death to birth. The ordinary gestation period is between 265 and 280 days, roughly nine months. Could X have been the biological father? Biologically, it is possible that Z was conceived shortly before X's death, since seven months is well within the gestation window.

This is precisely the Roman law problem of turbatio sanguinis — confusion of blood — that arises when a woman marries in quick succession after the dissolution of one marriage. In Sethu v. Palani (AIR 1924 Mad 677), a woman was divorced from her first husband in June 1904 and married another man in July 1904, giving birth to a son in September 1904. The conception had clearly occurred during the subsistence of the first marriage. Yet the Madras High Court held the child to be the legitimate son of the second husband, since birth took place during the second marriage. The principle laid down was unequivocal: under Section 112, the decisive point is the date of birth, not the date of probable conception.

Applying this squarely to the present problem: Z was born during P's valid marriage with Y. The presumption under Section 116 of the BSA therefore points decisively to Y as the legal father of Z. Whether X could biologically have been the father is a question the law deliberately sidesteps. The only way Y could avoid legal paternity is by proving non-access — that is, by showing that he had no opportunity for marital intercourse with P at a time when Z could have been begotten. On the facts given, there is no such suggestion.

Decision on Problem I

Y is the legal father of Z. Z is conclusively presumed to be the legitimate child of Y by virtue of Section 116 of the BSA (Section 112 of the Indian Evidence Act), since he was born during the continuance of a valid marriage between his mother P and Y. No evidence of non-access has been alleged or established. The fact that X's access to P was also possible around the time of conception is legally irrelevant, unless Y can prove non-access — which on these facts he cannot.

Problem II: The DNA Test, Divorce, and Maintenance — Is 'A' Liable?

Setting the Stage

A and B were married in 2000. A son C was born in 2002, during the subsistence of the marriage. A suspected B of an extra-marital affair and believed C was not his biological son. A obtained a decree of divorce. When B filed for maintenance for C, A denied paternity, sought a DNA test, and the result showed that C was not his biological son. Is A liable to pay maintenance for C?

This problem sits at the precise intersection of legal presumption and scientific truth — the most contested battleground in modern Indian evidence law.

The Presumption Arises Without Doubt

C was born in 2002, during the continuance of a valid marriage between A and B. The conditions of Section 116 of the BSA are fully satisfied. The conclusive presumption of legitimacy attaches to C as A's son. As the Supreme Court held in Goutam Kundu v. State of West Bengal (1993) 3 SCC 418, this presumption is very strong and can be displaced only by a strong preponderance of evidence, not by a mere balance of probabilities.

The burden of proving non-access lies squarely on A — the party who seeks to deny legitimacy. This is not a burden that can be discharged lightly.

The Only Mode of Rebuttal: Non-Access

The section is unambiguous. The only legally recognised mode of rebutting the presumption is proof of non-access — that A had no opportunity for marital intercourse with B at the time C could have been begotten. In the present facts, A and B were living as husband and wife in 2001–2002 when C was conceived. There is no suggestion of any physical impossibility of access. A does not claim he was imprisoned, hospitalised, serving in a distant location, or impotent. His suspicion is of a factual and relational nature, not of physical impossibility.

In Vasu v. Santha (1975 Kerala Law Times 533), the Kerala High Court held with striking clarity that even proof that the mother committed adultery with any number of men will not suffice to prove illegitimacy, if she had access to her husband during the time the child could have been begotten. This observation was quoted with approval by the Supreme Court in Goutam Kundu. Adultery, in other words, does not equal non-access.

The DNA Test: Scientific Truth vs. Legal Fiction

The most provocative aspect of this problem is the DNA test result conclusively showing that C is not A's biological son. Does this override the presumption?

This is where the law has been genuinely unsettled, and where courts have spoken in different voices. The older and more conservative position was articulated in Kamti Devi v. Poshi Ram (AIR 2001 SC 2226), where the Supreme Court observed that even the result of a genuine DNA test may not be enough to escape the conclusiveness of Section 112, particularly where the husband and wife were living together during the time of conception. The Court reasoned that the standard of proof required to rebut the conclusive presumption must be somewhere between proof beyond reasonable doubt and mere preponderance of probabilities.

However, the legal landscape shifted significantly with Nandlal Wasudeo Badwaik v. Lata Nandlal Badwaik (2014) 2 SCC 576, where the Supreme Court took a more pragmatic and science-friendly position. The Court declared that when there is evidence to the contrary — including DNA evidence — the presumption is rebuttable and must yield to proof. The Court's words were powerful: "The interest of justice is best served by ascertaining the truth... when there is a conflict between a conclusive proof envisaged under law and a proof based on scientific advancement accepted by the world community to be correct, the latter must prevail over the former." In that case, the husband's plea that he had no access was proved by the DNA report, and the Court declined to compel him to bear legal fatherhood.

So the critical question is not whether the DNA test was conducted, but how the courts now weigh it.

Courts Will Not Order DNA as a Matter of Course

It is important to note what Goutam Kundu firmly established regarding the procedure for ordering DNA tests. The Supreme Court laid down that courts in India cannot order a blood/DNA test as a matter of course. Any such prayer must be preceded by a strong prima facie case of non-access. The court must weigh the serious consequences — branding a child as illegitimate and a mother as unchaste. No one can be compelled to give a sample of blood for analysis. The test should be allowed only when eminently needed and when other evidence is insufficient to reach the truth — as reiterated in Bhabani Prasad Jena v. Convenor Secretary, Orissa State Commission for Women (2010) 8 SCC 633.

In the present problem, however, the DNA test has already been conducted and A has obtained the report. The question is now whether the court will accept it.

The Adverse Inference Under Section 119, Illustration (h) of the BSA

If B refuses to cooperate with DNA testing or challenges it without basis, the court may draw an adverse inference under Section 119, Illustration (h) of the BSA (corresponding to Section 114, Illustration (h) of the Indian Evidence Act) — that the evidence, if produced, would be unfavourable to her. In Dipanwita Roy v. Ronobroto Roy (2015) 1 SCC 365, the Supreme Court held that if a wife refuses to submit to a DNA test directed by the court, a negative presumption can be drawn against her, and her infidelity can be decided on that basis without expressly disturbing the presumption under Section 112.

Decision on Problem II

The answer to this problem requires nuance and cannot be given in absolute terms.

The stronger legal position, based on the preponderance of authority, is that A remains legally liable to pay maintenance for C. Here is why:

First, C was born during a valid marriage, and the presumption under Section 116 of the BSA attaches firmly. Second, A has not proved non-access — he and B were cohabiting as husband and wife in 2001–2002. His suspicion of an extra-marital affair, however genuine, does not equal proof of non-access. Third, as Vasu v. Santha and Goutam Kundu make clear, proof of adultery alone is insufficient to displace the presumption. The law asks only whether the husband had access — not whether someone else also had access.

Fourth, and critically, even accepting the shift in judicial attitude brought by Nandlal Wasudeo Badwaik, the DNA test here was used not to establish non-access in a context where physical access was clearly possible. A and B were living together, and there is no impossibility of access to speak of. Where husband and wife were cohabiting at the time of conception, even a negative DNA result may not suffice to rebut the presumption — and this was precisely the caution the Court entered in Kamti Devi.

It is a "strange but just" proposition that the law sometimes foists legal paternity on a man who may not be the biological father. This, however, is a deliberate legislative choice grounded in public policy — the welfare of the child, the sanctity of marriage, and the protection of innocent children from the lifelong stigma of being called filius nullius, a child of no one. As the BSA's Section 116 makes clear, the presumption exists for the protection of the child, not merely as a rule of procedure.

A is therefore legally bound to pay maintenance for C, unless he can establish, by strong and convincing evidence, that there was truly no access — no opportunity whatsoever for marital intercourse — during the time of C's conception. The DNA test result alone, in a situation where cohabitation was ongoing and access was clearly possible, is insufficient to discharge that burden.

The Broader Principle

These two problems together illuminate a single unifying truth: Section 116 of the BSA is not merely a rule of evidence — it is a rule of social policy. Its purpose, as courts have repeatedly held, is to lean in favour of legitimacy and to resist, with considerable force, any attempt to bastardise a child born of a valid marriage. The law asks only whether the husband could have been the father — not whether he definitely was. When access was possible, the law's answer is settled: the husband is the father, and all the rights and responsibilities that flow from that status — including the duty of maintenance — follow as a matter of legal consequence.