William Marotta answered a Craigslist ad in 2009 to donate sperm. A Kansas couple wanted a donor. He signed a written agreement waiving his parental rights, handed over a syringe at home, and walked away. Four years later, the state of Kansas was in court trying to make him pay child support. The couple had separated, one of them applied for public assistance, and the state wanted a father to bill. Marotta eventually won. A Shawnee County district court ruled in 2014 that he was not the legal father and owed nothing. He spent years fighting the claim to get there.
The central legal fact of sperm donation is that your protections depend on how and where you donate, not on what you sign. A contract alone does not override state parentage law.
Clinic donation versus private arrangement
The single most important variable in US sperm donation law is whether a licensed physician or sperm bank is involved. Under the Uniform Parentage Act, which most states have adopted in some version, a man who provides sperm to a licensed physician for assisted reproduction is not a legal parent of any resulting child. The physician's involvement is what triggers that protection. Your signature alone does not.
A private arrangement, even with a signed agreement, does not automatically get the same treatment in most states. Child support is considered a right of the child. Courts in many jurisdictions will not let two adults sign away a child's right to financial support. Some states have updated parentage laws to protect known donors who go through a clinic even when they know the recipients. Very few extend that protection to at-home insemination without a doctor's involvement. If you are considering a private donation, speak with a family law attorney in the state where the child will be born before you sign anything. Your contract is only as good as that state's parentage statute.
Parental rights and obligations
Donating through a licensed clinic severs legal parenthood in both directions. You are not the legal father. You owe no child support. You have no custody or visitation rights. Any resulting child has no automatic inheritance claim against your estate under intestacy laws. You also have no say in how the child is raised, what religion they practice, or where they live.
That two-way severance surprises some men. They want to donate but assume they will retain some connection if they want it later. Through a bank, you generally will not. In the Uniform Parentage Act framework, the intended parents are the legal parents from birth. Their names go on the birth certificate, not yours. Your name appears nowhere in the child's legal identity.
Anonymity is not a promise
No US federal law guarantees donor anonymity. Anonymity is a function of the contract you sign with the bank and the laws of the state where the donation occurs. Banks increasingly offer open ID arrangements, where the child can request the donor's identifying information at 18. Some banks are entirely open ID. Others offer both options.
Outside the US, the trend has been away from anonymity for years. The United Kingdom removed donor anonymity in 2005. Any child conceived from a donation made after April of that year can request identifying information from the Human Fertilisation and Embryology Authority when they turn 18. Sweden moved in this direction in the 1980s. New Zealand and several Australian states have followed.
Even if you donate anonymously, DNA databases have changed what anonymity means in practice. Yaniv Erlich and his colleagues at Columbia University published a study in Science in 2018 showing that with a database of roughly 1.3 million people, about 60 percent of Americans of European descent could be matched to a third cousin or closer. You may never take a DNA test in your life. If your second cousin has, you're identifiable. Don't donate under the assumption that you'll stay hidden forever.
Compensation and taxes
US sperm banks compensate donors per donation. The exact amount varies by bank, by demand, and by donor profile. Whatever you earn is taxable income. The bank will typically report it, and you're responsible for including it on your return. This catches a lot of men off guard. They treat the money as casual cash, then get a tax document in January and owe. Set aside a portion of what you earn. If you donate regularly, the total can push into thousands of dollars over a year.
Some men donate at more than one bank over time. That income is still taxable from every source. Keep your own records.
The contract you sign
Before you donate a single sample, the bank will put a donor agreement in front of you. It covers far more than compensation.
Screening and testing you agree to
You agree to FDA-mandated screening for communicable diseases under 21 CFR Part 1271, which governs human cells, tissues, and cellular and tissue-based products. You agree to provide a complete medical and family history. You agree to genetic carrier screening. You may be required to abstain from sex with certain partners during the donation period to reduce disease transmission risk through the testing window period.
Ownership, exclusivity, and stored samples
Read the exclusivity clause. Some banks require that you not donate to another bank while you are under contract with them. Read the sample ownership clause. Once you provide semen, the bank typically owns it. You generally cannot later revoke consent for its use or demand that stored samples be destroyed. If you stop donating, the contract will specify what happens to samples already in storage. Some banks destroy them. Some retain them. Know which applies to you.
Medical history and liability
You have a legal obligation to be truthful about your medical and family history. Knowingly concealing a serious genetic condition, a family history of heritable disease, or a communicable disease could expose you to civil liability. A recipient who relies on your disclosed history and later has a child with a condition you knew about and withheld could sue. This is a contract and fraud issue more than a criminal matter, but the financial exposure is real.
The practical point runs deeper than liability. Banks run genetic carrier panels that screen for hundreds of conditions. The results become part of your record with the bank. Before you donate, think through what you know about your family's health history in detail. Ask older relatives while they are still around to ask. The information you provide shapes what families are told about you.
Family caps
The United States has no federal legal limit on how many families can use one donor. Some banks set internal policies, commonly a maximum number of families, though the exact number varies. Other countries regulate this by statute. In the United Kingdom, the legal limit is 10 families per donor. If you care about the number of donor-conceived half-siblings that could result from your donation, ask the bank for its specific family cap policy before you commit. Don't assume a low number exists. Ask, in writing.
A practical pre-donation checklist
Before you donate, run through this list.
- Confirm the arrangement is through a licensed clinic or sperm bank. If it is private, pause and speak with a family law attorney.
- Read the donor agreement in full. Look at exclusivity, sample ownership, and what happens to unused samples.
- Ask whether the donation is anonymous or open ID, and what happens when the child turns 18.
- Ask for the bank's family cap policy in writing.
- Plan for taxes on any compensation you receive.
- Complete your family health history before the intake interview.
- If you have questions about the genetic screening, speak with a genetic counselor.
Sperm donation law rewards men who read the fine print and punishes men who assume the system protects them. The protections exist. They do not apply automatically.
This content is for educational purposes only and is not medical advice. Oakman products are designed for physical comfort and cooling; they make no claims about fertility, sperm quality, or hormone levels. Consult a healthcare professional for personalized advice.