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Can the father be added later? Recognition, child support and the child’s name

When you are not married, the law does not make any man the father on its own. You are the mother from the birth. A man becomes the legal father later, by recognising the child or by a court decision, and the rules on your consent, on support and on the surname differ from country to country.

Checked October 2026One section for each country

India

  • Naming the father: India has no separate act of recognition by an unmarried father. His name goes into the birth register when the birth is reported, or later by court order. In 2026 a registrar refused to add a father’s name, and the Kerala High Court ordered it added after a Family Court decree on paternity.
  • Guardianship: for Hindus (including Buddhists, Jains and Sikhs), the Hindu Minority and Guardianship Act 1956, section 6(b), makes the mother the natural guardian of a child born outside marriage, and the father only after her. For Muslims, the Supreme Court has said custody of such a child belongs to the mother and her relations. For Christians, guardianship is under the Guardians and Wards Act 1890, and the Supreme Court held in 2015 that a mother who applies does not have to notify the father.
  • Child support: under the Bharatiya Nagarik Suraksha Sanhita 2023 (BNSS), section 144, a Magistrate can order a father to pay a monthly amount for his child, born in or outside marriage. This applies to every religion. For Hindus, the Hindu Adoptions and Maintenance Act 1956, section 20, says the same.
  • No waiver: the Supreme Court held in 2019 that a mother cannot give up her child’s right to maintenance, and set aside an agreement that tried to. The Bombay High Court said the same in 2014. So an agreement that he will never pay does not bind the child.
  • The surname: no law fixes the surname of a child born outside marriage. In Akella Lalitha (2022) the Supreme Court held that a mother who is the natural guardian may decide her child’s surname. That case was about a widow.

Malaysia

If you are Muslim, the Islamic Family Law (Federal Territories) Act 1984 applies (each state has its own enactment):

  • Custody of a child born out of wedlock belongs “exclusively to the mother and her relations” (section 85).
  • The Syariah Court can order the mother to maintain the child (section 80(1)). The part that concerned the father was deleted, and no section makes the biological father liable.
  • A child is the husband’s only if born more than six lunar months after the marriage (section 110), so marrying during the pregnancy may not change this.
  • The father cannot give a daughter in marriage. A wali hakim (a religious official) does, through the religious office.
  • The child cannot carry the biological father’s name (Federal Court, 13 February 2020).

If you are not Muslim:

  • The father’s name goes on the register only if you and he ask together, and he signs (Births and Deaths Registration Act 1957, section 13). The child may then take his surname at his request (section 13A).
  • A court can order a man to maintain “an illegitimate child of his”, once this is proved (Married Women and Children (Maintenance) Act 1950, section 3(2)). If he does not pay, the court can seize property, or send him to prison for up to one month for each month unpaid (section 4).
  • If you later marry him, the child becomes legitimate (Legitimacy Act 1961, section 3).

Indonesia

  • The Constitutional Court ruling: in decision No. 46/PUU-VIII/2010 (17 February 2012), the Court held that a child born outside marriage has a civil relation with the mother and her family, and also with the man proved to be the father “by science and technology” (for example a DNA test) or other legal evidence, and with his family.
  • Recognition at the registry: limited. The father can recognise the child at Dukcapil only if you had a religious marriage that is not yet registered (Law No. 24 of 2013, article 49(2)). Otherwise, a court decides.
  • If you are Muslim: under the Compilation of Islamic Law (KHI), article 100, the child has nasab (family lineage) only with you and your family. The Indonesian Ulema Council, in Fatwa No. 11 of 2012, says there is no nasab, guardianship for marriage, inheritance or maintenance with the man. But the government may require him to provide for the child, and to leave the child property by a compulsory will (wasiat wajibah). A daughter is given in marriage by a wali hakim. Family cases go to the Religious Court.
  • If you are not Muslim: under the Civil Code (KUHPerdata), article 280, recognition creates the legal tie with the father. Family cases go to the District Court.

Thailand

  • Your position: the child is by law your legitimate child, and you alone hold parental power (Civil and Commercial Code, section 1546).
  • How he becomes the legal father: only if you marry, if he registers the child as his, or if a court declares it (section 1547).
  • Your consent: registration needs the consent of the child and of the mother, given in person to the registrar (section 1548). A baby cannot consent, so for a young child the father must go to the Family and Juvenile Court, where your consent and the child’s interest weigh most. He cannot become the legal father without your agreement or a court judgment.
  • A court claim: you, for a child under 15, or the child later, can ask the court to declare a man the father (section 1555). Grounds include a document in which he acknowledges the child, his name on the birth registration with his consent, or treating the child as his, such as paying for the child or letting the child use his surname. From 15 the child can sue alone, and up to one year after turning 20 (section 1556). A court that declares him the father can also order support.
  • The surname: your surname by default. The father’s surname if both of you consent at registration.

Vietnam

  • Recognition: parents have the right to recognise a child (Law on Marriage and Family 2014, article 91). At the civil status office, he makes a declaration with evidence, such as a DNA test, letters or photos. Both parties must be present, and it is registered if there is no dispute (Law on Civil Status 2014, article 25). His name is then added to the birth certificate.
  • A court: if there is a dispute, a court decides (Law on Marriage and Family, article 101). The father, the mother, the child, a guardian, family and child agencies or the Women’s Union can ask a court to determine the father of a minor child (article 102(3)).
  • Child support: a parent who does not live with a minor child must support the child (article 110).
  • The surname: by agreement of the parents. If the father is not determined, the child takes your surname (Civil Code 2015, article 26(2)).
  • Clinic donors: a donor through a clinic never becomes the father (Law on Marriage and Family, article 93(3)).

Cambodia

  • Your position: the woman who gives birth is the mother (Civil Code 2007, article 987). When you are not married, no man is presumed to be the father (article 988). You hold parental authority (article 1038(1)).
  • Recognition: the father can acknowledge a child after the birth, and the Code does not ask for your consent (article 995(1)). Before the birth, he needs your consent (article 995(2)). He does it at the family registration office, or by will (article 997), or by signing the birth register as father (article 998). It cannot be taken back (article 1000).
  • A court claim: the child, or you for a minor child, can sue for acknowledgment (article 1001). The child has one year from learning who the father is, counted from adulthood if the child was a minor.
  • After recognition: he gets parental authority only if you agree, or by court decision (article 1038(2)-(3)). Contact and sharing the child’s costs are agreed between you, or decided by the court (article 1040).

Laos

  • Affiliation: under the Civil Code 2018, article 197, a father who is not married to the mother becomes the legal father by a joint request: he acknowledges the child and you agree. If he is married to someone else, this does not stop it.
  • A court: if he refuses, you or a guardian can ask the court. It recognises him only if you lived together and shared assets, if you raised the child together, or on biological evidence such as DNA.
  • Child support: parents must care for their minor children whether they live together or not. The parent caring for the child can claim support, based on half of the lowest civil servant’s salary (article 217). Not following a court order on child care is an offence (Penal Code 2017, article 261).
  • The surname: the father’s, yours or both, by agreement; the court decides if you disagree (article 196).

Myanmar

  • Child support: under the Child Rights Law 2019, section 42(a), “every father shall be responsible for providing child allowance for each of his children”. If he fails without good reason, you can sue (section 42(b)). The court can order up to 50,000 kyat per child per month (section 43).
  • Guardianship: both parents are the child’s guardians (section 35).
  • Recognition: we found no law that sets out how an unmarried father recognises a child. Since 2021, courts work unevenly, depending on where you live.

What Option B’s “no claims” means in law

In Option B, he makes no claim on the child, and you ask nothing of him. That is an understanding between two people. It is not a legal protection, for him or for you.

  • The law gives the child rights of its own. In India, the Supreme Court has said a mother cannot sign away her child’s maintenance. In Thailand, Vietnam, Cambodia, Laos and Indonesia, you or the child can ask a court to name the biological father. In Malaysia, a non-Muslim father can be ordered to pay once it is proved he is the father. In Myanmar, every father must support each of his children.
  • The only donor protections are clinic rules, and none covers a man you know. India’s ART Act 2021, section 31(2), takes parental rights away from a donor through a registered bank, but does not say he is free of duties. Thailand’s ART Act, section 29, protects only donors in treatment for a married couple. Vietnam’s protection is for anonymous clinic donors.
  • What he can do alone differs. In Cambodia, a father can acknowledge a born child without your consent. In Thailand and Laos, he cannot become the legal father without your agreement or a court.

This is why Option B is done only at a clinic abroad, in a country whose law lets a single woman use a donor she knows and says the donor is not the legal father. See treatment abroad.

Checked October 2026. Laws change: check the rules in force in your country with the registrar, the family court or the Syariah court.

Sources

  • India: Hindu Minority and Guardianship Act 1956, s. 6(b); Hindu Adoptions and Maintenance Act 1956, s. 20; Bharatiya Nagarik Suraksha Sanhita 2023, s. 144; Assisted Reproductive Technology (Regulation) Act 2021, s. 31 (Gazette of India); ABC v. State (NCT of Delhi), Supreme Court, 6 July 2015; Akella Lalitha v. Konda Hanumantha Rao, Supreme Court, 28 July 2022; X v. State of Kerala, Kerala High Court, 1 June 2026; Supreme Court, 2019, and Bombay High Court, 2014, on maintenance (as reported), checked October 2026.
  • Malaysia: Islamic Family Law (Federal Territories) Act 1984 (Act 303), ss. 80, 85, 110; Births and Deaths Registration Act 1957 (Act 299), ss. 13, 13A; Married Women and Children (Maintenance) Act 1950 (Act 263), ss. 3, 4; Legitimacy Act 1961 (Act 60), s. 3 (Attorney General’s Chambers); Ministry of Health Selangor leaflet, 2010, checked October 2026.
  • Indonesia: Constitutional Court decision No. 46/PUU-VIII/2010, 17 February 2012; Law No. 24 of 2013, art. 49(2); Compilation of Islamic Law (KHI), art. 100; MUI Fatwa No. 11 of 2012; Civil Code (KUHPerdata), arts 280, 281, checked October 2026.
  • Thailand: Civil and Commercial Code, ss. 1546 to 1548, 1555, 1556; Protection of a Child Born by Medically Assisted Reproductive Technology Act B.E. 2558 (2015), s. 29; Royal Thai Embassy birth registration pages, checked October 2026.
  • Vietnam: Law on Marriage and Family No. 52/2014/QH13, arts 91, 93, 101, 102, 110; Law on Civil Status No. 60/2014/QH13, art. 25; Civil Code No. 91/2015/QH13, art. 26, checked October 2026.
  • Cambodia: Civil Code 2007, arts 987, 988, 995, 997, 998, 1000, 1001, 1038, 1040, checked October 2026.
  • Laos: Civil Code 2018, arts 196, 197, 217; Penal Code 2017, art. 261, checked October 2026.
  • Myanmar: Child Rights Law 2019 (Law No. 22/2019), ss. 35, 42, 43, checked October 2026.

In Option A, he is a father your child can know, and he helps pay for the child. Money in Option A explains how, and Option B explains what he steps away from.