Known Donation UK: Who Counts as the Legal Parent

2026-08-29 · J. Ewert

In known donation outside a HFEA licensed clinic, the donor is normally the child’s legal father where the birth mother is single or in a relationship that is neither a marriage nor a civil partnership. UK law removes a donor’s legal parenthood through the licensed clinic route, or by giving the position to the mother’s spouse or civil partner. A written agreement between the two of you does not do it.

That single rule sits behind almost every worry people bring to known donation in the UK, and it works differently depending on the recipient’s relationship status rather than on anyone’s intentions. This article sets out where legal parenthood comes from, what it controls, what happens to child maintenance and contact, and how a licensed clinic changes the answer. One thing belongs at the top. sperm-donation.com is a matching platform, and that is the entire product. We do not handle, store, test, or ship anything biological, we are not a clinic or a sperm bank, we do not verify identity or health, and we do not give legal or medical advice. The checks, and the decisions, stay with you.

Is a known sperm donor the legal father in the UK?

Usually yes, where the donation happens outside a HFEA licensed clinic and the birth mother is single or unmarried. The law that removes a donor’s fatherhood is tied to the licensed clinic system, so a private arrangement generally falls back on the biological position.

The relevant provisions sit in Part 2 of the Human Fertilisation and Embryology Act 2008. Section 41(1) says that where a man’s sperm was used after he gave the consent required by paragraph 5 of Schedule 3 to the 1990 Act, he is not to be treated as the father of the child. That consent is the paperwork a licensed clinic takes before a donation is used, which means the protection in section 41 is a clinic mechanism. A man who hands over a sample at a kitchen table has given no such consent to anybody, because there is no person responsible under a licence to give it to.

The HFEA states the same conclusion in plainer words in its FAQs on unregulated sperm donation, where it says that a donor used outside a licensed clinic may be considered the legal parent of the child, and that if the donor thinks of himself as the legal parent now or in future, the question may have to be resolved through the courts. The regulator adds that there is no guarantee what a court will decide.

Does it matter whether the birth mother is married?

It changes the answer completely. Sections 35 and 42 of the 2008 Act hand legal parenthood to the birth mother’s spouse or civil partner without any requirement that a clinic was involved, and section 38(1) and section 45(1) then close the door on anyone else being the father.

Section 35 applies where the birth mother was married to a man or in a civil partnership with a man at the time of insemination. He is treated as the father unless it is shown that he did not consent. Section 42 applies where she was in a civil partnership or marriage with a woman at that time, and her wife or civil partner is treated as a parent unless it is shown that she did not consent. Neither section mentions a licence, so both work at home.

The practical effect is a sharp split between couples. A married female couple inseminating at home, where both agree to it, produces a child with two legal parents from birth and no legal father anywhere in the picture. An unmarried female couple doing exactly the same thing produces a child whose second legal parent is the donor, because the route that gives an unmarried partner parenthood is section 43, and section 43 only operates in the course of treatment services provided under a licence. Our guide to how home insemination works covers the practical side, and the difference above is why the legal side is worth settling before anyone starts tracking cycles.

When is a donor definitely not the legal parent?

Where the donation and the insemination both happen at a HFEA licensed clinic and the donor has given the consents the clinic takes. The HFEA puts it as a flat statement: if you have treatment in a licensed clinic, the donor will not be considered the legal parent, because he agreed to that at the time of donation.

This applies to a known donor as much as to an anonymous one, and the HFEA is explicit that patients can bring a known donor to a licensed clinic to get the tests, checks, counselling and consents. The word anonymous does a lot of work here that it does not do elsewhere. Anonymous donation has been legally impossible in the UK since 2005, and every donor registered through a licensed clinic is identity release, meaning a donor conceived person can apply to the HFEA for identifying information about the donor at 18.

Going through a clinic with someone you already know is the only arrangement in UK law that gives you a known donor and a clean parenthood position at the same time. Our comparison of a sperm bank and a known donor sets out what each route asks of you in practice.

Is a donor agreement legally binding in the UK?

No. A pre conception agreement between a donor and a recipient does not decide legal parenthood in the UK, and it cannot be used to contract out of parental status or out of financial responsibility. Parenthood follows the statutory rules in the 2008 Act and, failing those, the biological position.

Family lawyers still draft these documents, and courts have been willing to look at them as evidence of what everyone intended at the time. Evidence of intention is a different thing from a binding contract. The document does not stop a donor from applying to court, it does not stop the Child Maintenance Service from treating a legal father as a paying parent, and it does not create parenthood for a partner who does not have it under the Act.

What the conversation behind the document is worth is considerable. Writing down who expects what, how often contact would happen, what the child will be told and at what age, and what happens if someone moves away, forces the disagreements into the open while everyone can still walk away. Our guide to a first meeting with a known donor covers the questions worth asking, and talking to a child about donor conception covers the part people postpone longest. Anything about your own legal position belongs with a family law solicitor rather than with a template.

What does legal parenthood actually control?

Legal parenthood is the lifelong status that connects a child to an adult for nationality, inheritance, financial responsibility and the birth register. The HFEA lists exactly those areas when it explains why the question matters in unregulated donation.

A legal parent is the person recorded on the birth certificate, the person a child can inherit from without a will, the person whose nationality can pass to the child, and the person the state can pursue for financial support. There are only ever two legal parents at a time, which is why section 38(1) says that where a man is the father under section 35 or 36 no other person is treated as the father, and section 45(1) says that where a woman is a parent under section 42 or 43 no man is treated as the father.

Legal parenthood is also very hard to shift once it exists. It ends through adoption or a parental order, and it is confirmed or corrected through a declaration of parentage in court. There is no form that quietly removes a legal father because everyone involved would prefer he was not one.

Is parental responsibility the same as being a legal parent?

No, and the two come apart often in known donation. Parental responsibility is the day to day authority to make decisions about a child, covering things like schooling, medical treatment and travel, while legal parenthood is the underlying status.

GOV.UK sets out who has parental responsibility: the person who gives birth has it automatically, a spouse or civil partner of the birth mother usually has it automatically where they consented to the treatment, and someone who is not married to or in a civil partnership with the birth mother can acquire it by registering the birth jointly with her, by agreement, or by court order.

A known donor who is a legal father under the fallback position does not automatically hold parental responsibility. He would acquire it by being named on the birth certificate through joint registration, by a parental responsibility agreement, or by applying to court. That gap is the reason some families with a legal father in the picture treat the birth registration decision as the significant one rather than a formality.

Can a known donor be asked to pay child maintenance?

Where a man is the child’s legal father, he is a parent for child maintenance purposes and can be assessed like any other paying parent. A private agreement saying otherwise does not remove that liability.

The Child Maintenance Service works out a weekly amount from the paying parent’s gross annual income as reported by HMRC, adjusts for pension contributions and other children, and applies one of five rates. The service takes the parent’s income as its starting point rather than anyone’s intentions about the arrangement. Where the paying parent’s gross weekly income is above £3,000, the receiving parent can apply to the courts for additional maintenance.

The exposure runs both ways and lasts a long time. A donor who is a legal father can be pursued for maintenance, including in situations he did not expect, such as the recipient later needing to claim benefits. A recipient who assumed the donor had no financial standing may equally find he has a legal parent’s claim to be involved in the child’s life.

Can a known donor apply for contact with the child?

Yes. A donor can ask the court for permission to apply for a child arrangements order even where he is not a legal parent, and the court decides both the permission question and the substantive one by reference to the child’s welfare.

The reported example is Re G (A Minor); Re Z (A Minor) [2013] EWHC 134 (Fam), where two men had donated on a known basis to two female couples and the legal parenthood of the children sat with the mothers and their civil partners. The High Court granted the men leave to apply for contact orders under section 8 of the Children Act 1989. It was the first decision of its kind, and it establishes that the absence of legal parenthood does not by itself close the courtroom door.

Read the other way round, the case is also a reminder that leave to apply is not the same as a contact order. The court still decides what serves the child. What it does mean is that a donor who becomes involved in a child’s life is in a position that no piece of paper signed beforehand can neatly wind back, which is why the contact conversation belongs before conception rather than after.

Is unregulated donation legal in the UK?

Receiving a donation outside a licensed clinic is not a criminal offence for the recipient, and the HFEA says so directly. The donor and anyone helping to make sperm available can be committing serious offences, because using, storing, procuring, testing, processing and distributing gametes are all restricted to licensed clinics under the HFE Act.

The regulator spells out where the lines fall. Freezing sperm is storage and is an offence outside a licence. Arranging for sperm to be delivered to someone, whether by an individual or a business, is procurement and is an offence. The HFEA says it refers people it has concerns about to the police, and points to a 2010 prosecution in which two men were convicted, resulting in a fine and a suspended sentence.

This is one reason the platform’s role stays as narrow as it does. sperm-donation.com is a place where people create profiles and message each other, and nothing biological passes through it at any point. What happens after two people have found each other is entirely theirs, including the choice of whether to involve a licensed clinic.

What does the HFEA say about serial donors and natural insemination?

In a statement published on 8 June 2026, the HFEA said it was very concerned that people are being exploited by serial sperm donors on apps, websites and social media, that many of these men already have hundreds of donor conceived children, and that some advertise for sex, described as natural insemination, as their way to donate.

The regulator is direct that this claim is false, saying in its FAQs that natural insemination is not a more successful way to receive a donation and that no one should feel pressured into having sex with a stranger. Natural insemination is a pattern people report encountering on donor sites and in groups, and it carries the health risk of unprotected sex with someone whose testing you cannot verify. It is not a method that sits alongside the others.

The HFEA also raises numbers. Some serial unregulated donors have led to more than 200 children in the UK, and because there is no official record of who fathered them, the risk of donor conceived half siblings meeting unknowingly rises. A licensed clinic in the UK is held to a ten family limit. Our guide to donor siblings and numbers goes through how people think about that in practice, and what people test for before a donation covers the health side.

Why do people use known donation despite all this?

Cost and access, mostly. In the same June 2026 statement, the HFEA noted that the fertility sector is unusual in UK healthcare because most patients fund their own treatment, and that single patients and female same sex couples who need a donor are the groups with the least NHS funding.

The HFEA report Family formations in fertility treatment 2022 puts figures on it. About 16 per cent of female same sex couples and 18 per cent of single patients had NHS funding for their first IVF cycle in 2022, compared with 52 per cent of opposite sex couples aged 18 to 39. The HFEA’s statement on unregulated sperm donation says plainly that it does not blame anyone for using an unregulated donor and that it knows people feel they have no choice.

Understanding why people choose known donation is separate from understanding what it does to legal parenthood. Both are worth knowing before starting. Our comparison of Facebook groups and donor platforms covers where people actually look, and our review of CoParents looks at one of the longer running sites.

Frequently asked questions

The short version

UK law does not ask what you meant. It asks where the insemination happened and who the birth mother was married to. Outside a HFEA licensed clinic, with a single or unmarried recipient, the donor is the legal father, and that carries maintenance liability on one side and standing to seek involvement on the other. Inside a licensed clinic, his consent removes it, and the arrangement can still be with someone you know and picked yourself.

The middle case catches people out most often. A married or civil partnered recipient whose partner consents already has a second legal parent at home under sections 35 and 42, with no clinic needed. The same couple unmarried has no route to that position outside a clinic, which makes a registry office appointment a more consequential piece of planning than most people expect.

An agreement between a donor and a recipient does not change any of this, and treating one as protection is where the real risk sits. The conversation behind it is worth having anyway, in full, before anyone starts tracking cycles. If you are working out where to begin, how home insemination works and timing around ovulation cover the practical ground. Profiles on sperm-donation.com are free to browse, and every decision after that stays with you.