Birth Registration Does Not Create Parental Responsibility: Only the Genetic Father Can Acquire PR under Children Act 1989 s 4

1. Introduction

J, Re (Loss of Parental Responsibility) [2026] EWCA Civ 344 is a combined judgment of the Court of Appeal (Civil Division) (Sir Andrew McFarlane P, King LJ and Stuart-Smith LJ) given after hearing three linked appeals over three days. Each appeal concerned the interaction between (i) legal fatherhood, (ii) birth registration, and (iii) the acquisition (and potential loss) of parental responsibility (“PR”) under the Children Act 1989 (“CA 1989”), especially s 4.

Two cases involved men registered as “father” on the birth certificate who were later shown by DNA evidence not to be the child’s genetic father:

  • Re J: AJ was registered as father in 2020 in the genuine but mistaken belief he was J’s biological father. DNA later disproved this.
  • Re M: AM was registered as father despite donor conception; DNA confirmed he was not the genetic father (and the judge found dishonesty).

The third case added a rare evidential problem:

  • Re P: conception could only have been by one of two identical twin brothers (TP1 and TP2). DNA could not differentiate the twins; the trial judge found each had a 50% chance of being the genetic father. TP1 was registered as “father”.

The central issues (as ultimately narrowed by concessions) were not about the importance of psychological or social parenting, but about a strict question of legal status: does registration as “father” confer PR under CA 1989 s 4 where the registrant is not (or cannot be proved to be) the genetic father?

2. Summary of the Judgment

The Court of Appeal laid down a clear and generally applicable rule:

  • “Father” in CA 1989 means the common law father: the genetic/biological father, save where statute expressly “treats” someone as a parent (e.g. adoption or human fertilisation legislation).
  • Birth registration does not create fatherhood, and therefore cannot of itself create PR for a person who is not in law the father.
  • Under CA 1989 s 4(1)(a), PR by registration arises only if two conditions are met:
    1. the person is the child’s genetic/biological father; and
    2. that person is registered as “father”.
  • Accordingly, where a non-father is registered as “father” (even in good faith), he never acquired PR in the first place; the question of PR being “automatically terminated” by a declaration, or requiring a separate removal order, does not arise.

Outcomes:

  • Re J: appeal dismissed; AJ never had PR.
  • Re M: appeal dismissed; AM never had PR (and the trial judge’s analysis was upheld).
  • Re P: the court upheld the refusal to make any FLA 1986 s 55A declaration (because neither paternity nor non-paternity could be proved on the balance of probabilities), but held it was wrong to leave ambiguity about PR; the court indicated an order under CA 1989 s 4(2A) should be made to discharge any PR TP1 “may have acquired”, and sought further submissions on welfare-related consequential issues.

3. Analysis

3.1 Precedents Cited

(A) Authorities confirming the common law meaning of “father” (genetic father)

  • Re M (Child Support Act: Parentage) [1997] 2 FLR 90: Bracewell J’s formulation—fatherhood is biological unless created “by operation of law” (adoption, HFEA etc)—was used as a succinct statement that there is “no other way” to be a parent absent specific legal mechanisms.
  • Re B (Parentage) [1996] 2 FLR 15: Bracewell J’s observation that “fatherhood concerns genetics” unless displaced by presumption of legitimacy or statutory intervention reinforced that Parliament must legislate expressly if it intends to alter parenthood rules.
  • Re D (IVF: Paternity of Child) [2005] 2 AC 621: cited for the structured statutory displacement of genetics in regulated fertility settings, and Lord Hope’s comments on statutory “treating” provisions—illustrating that departures from genetics occur only through explicit legal architecture.
  • P v Q and F [2024] EWCA Civ 878: central to the present decision’s logic on the status of birth registration. The Court of Appeal adopted Peter Jackson LJ’s analysis that registration is “practical evidence” but that parentage “does not spring from registration”.

(B) Authorities on registration as evidence, not legal creation, of parentage

  • P v Q and F [2024] EWCA Civ 878: provided the decisive framing—registration is not a legal presumption of parentage and is not conclusive.
  • Brierley v Brierley [1918] P 257: cited (via P v Q and F) for the proposition that registration is not conclusive evidence of parentage.

(C) Authorities invoked but confined to their context

  • Re G (Children) [2006] UKHL 43: Lady Hale’s “three ways” (genetic, gestational, social/psychological) were acknowledged as welfare-relevant categories, but the Court of Appeal stressed they were not redefining legal parentage.
  • Ghaidan v Godin-Mendoza [2004] UKHL 30: relied upon by AJ to argue for a Human Rights Act-compliant reading of “father” to protect Article 8 family life; the Court rejected the premise because (i) statutory language and scheme were clear and (ii) welfare-focused routes exist (s 8/s 12) to protect meaningful relationships without distorting legal parentage.
  • Somerset County Council v NHS Somerset CCG [2021] EWHC 3004 (Fam): used by the Secretary of State by analogy for the proposition that an order made without jurisdiction must be set aside as such, not “saved” by welfare balancing.

(D) First instance “journey” cases (acknowledged but not determinative)

The court listed but did not find it necessary to reconcile the nuanced differences across: RQ v PA [2018] EWFC 68, Re G [2018] EWHC 3360 (Fam), Re SB [2022] EWFC 111 and Re SB (No 2) [2023] EWFC 58, Re C (Children) [2023] EWHC 516 (Fam), ED v MG [2025] EWHC 1876 (Fam), Re X (A Child) (Husband of Child's Mother: Declaration of No Parental Responsibility) [2025] EWHC 2542 (Fam). Their importance lay in demonstrating the difficulty that the Court of Appeal now resolved at precedent level.

3.2 Legal Reasoning

(A) The interpretive keystone: “father” is a status concept, not a relationship concept

A significant feature of the appeals was the abandonment (during the hearing) of the argument that “father” in CA 1989 could include a psychological/social father. That concession aligned the appeals with the settled common law: legal parents are the gestational mother and the genetic father (subject to specific statutory “treating” provisions). Once “father” was fixed to genetics, the remaining question became: can registration alone override that status boundary for PR purposes? The answer was “no”.

(B) Registration is a trigger only for the right person

The court rejected the appellants’ “accessibility” submission (that Parliament knowingly tolerated errors and still intended PR to arise by registration). The statutory mechanism in CA 1989 s 4(1)(a) was read as conditional: registration is a route for a father to acquire PR, not a way for a non-father to become PR-holder. This is why the court formulated the two-condition test: the person must be (i) the genetic father and (ii) registered.

(C) “Void ab initio” reframed as “never acquired”

The first instance judge in Re J had used the notion of PR being “void ab initio”. The Court of Appeal preferred a cleaner statutory analysis: PR never arose because the statutory gateway was never satisfied. This distinction matters because it avoids importing private-law invalidity concepts and keeps focus on whether the statute ever conferred PR at all.

(D) Safeguarding practical parenting: CA 1989 s 3(5) and alternative routes

A recurring practical concern was: if the non-father “never had PR”, does that retrospectively make day-to-day parenting unlawful? The court answered by pointing to CA 1989 s 3(5), which permits a person with care of a child to do what is reasonable to safeguard/promote welfare. For the future, the court emphasised structured solutions: a non-parent psychological parent can obtain PR through a child arrangements order under s 8 combined with PR under s 12(2) or s 12(2A).

(E) Re P: separating (i) declarations of parentage from (ii) control of PR ambiguity

Re P demonstrates the boundary between proof-based declarations and welfare-based management:

  • No declaration under FLA 1986 s 55A could be made because neither “TP1 is the father” nor “TP1 is not the father” could be proved on the balance of probabilities (each was exactly 50% likely).
  • The guardian’s proposed “not proved” declarations were rejected because failure to prove paternity is not proof of non-paternity. The court treated FLA 1986 s 58(1) as requiring proof of the negative for a non-parentage declaration.
  • However, the court regarded it as contrary to P’s welfare to leave a continuing “Schrödinger’s PR” position (TP1 has PR if father, none if not, but unknowable which). It therefore identified CA 1989 s 4(2A) as the correct tool to discharge any PR TP1 may have acquired by registration, and proposed doing so to create clarity.

(F) Human rights and “abduction gap” concerns addressed institutionally, not by redefining “father”

The court accepted that an “abduction gap” may arise: a left-behind registered “father” later shown not to be genetic father may lack “rights of custody” for Hague Convention purposes. But that risk did not justify distorting CA 1989’s definition of “father”. Instead the court encouraged interim “protective scaffolding” through s 8 restrictions (e.g. leaving the jurisdiction) and, where appropriate, PR under s 12.

3.3 Impact

(A) Clarification at appellate level: a bright line rule

The decision establishes a clear appellate authority that: registration does not confer PR unless the registrant is the genetic father. This resolves a contentious practical issue that had generated repeated first-instance litigation (as reflected by the list of “journey” cases).

(B) Consequences for litigation strategy

  • Parties can no longer argue that a mistaken registration creates “interim PR” capable of being removed only by a welfare-based s 4(2A) application.
  • Psychological/social parents must look to s 8/s 12 routes rather than attempting to anchor PR to registration alone.
  • Where a declaration of non-parentage is made and there is any risk of international movement, courts are expressly encouraged to consider interim protective orders.

(C) Administrative and policy implications

The court invited the Secretary of State and Registrar General to consider displaying a simple statement of the legal definition of “father” in Register Offices. While not binding, this signals a preventive policy approach: reduce mistaken registrations by better public-facing information.

(D) Re P’s wider significance

Re P illustrates that where science cannot currently prove which of two men is the genetic father, the law may be forced to tolerate an imperfect “truth” (binary parentage). The case also signals that PR clarity can be achieved even where parentage clarity cannot, by using s 4(2A) and welfare-based orders under the CA 1989.

4. Complex Concepts Simplified

  • Legal father vs social/psychological father: the legal father is the genetic father (unless statute says otherwise). A social/psychological father may be crucial to the child’s life but does not become “father” in law by that fact alone.
  • Parental responsibility (PR): the legal authority to make major decisions for a child (education, medical treatment, travel, etc), as defined in CA 1989 s 3(1).
  • CA 1989 s 4(1)(a): an unmarried father can acquire PR by being registered as “father” if he is the father. Registration is a route, not a creator of fatherhood.
  • FLA 1986 s 55A declarations: the court can declare whether a person is (or is not) a parent, but only where the fact is proved to the required civil standard. “Not proved” is not the same as “proved not”.
  • CA 1989 s 3(5): a person caring for a child (even without PR) may do what is reasonable to safeguard/promote the child’s welfare—important for day-to-day care.
  • CA 1989 s 12 PR for non-parents: PR can be granted to non-parents through child arrangements orders, providing a lawful mechanism for social parents to have decision-making authority.

5. Conclusion

J, Re (Loss of Parental Responsibility) decisively separates three ideas that are often conflated in practice: birth registration (important evidence), legal fatherhood (a status grounded in genetics unless statute provides otherwise), and parental responsibility (a legal authority granted only through the statutory gateways). The new appellate-level rule is that being named as “father” on a birth certificate does not confer PR unless the person is in fact the genetic father.

The judgment is also pragmatic: it acknowledges the realities of psychological parenting and international risk, but directs parties and judges to the correct legal tools—s 8 and s 12 orders—rather than stretching the definition of “father”. In doing so, it strengthens clarity in status law while preserving welfare-focused flexibility through other parts of the CA 1989 scheme.