No, both parties do not have to agree to an annulment. One spouse can file alone, and a court will grant the annulment if that spouse proves valid legal grounds. Your spouse’s signature, cooperation, or approval is not part of the test. What matters is the evidence and whether the marriage meets your state’s requirements for nullity.
When Your Spouse Won’t Agree
An annulment case begins when one spouse (the petitioner) files a legal action naming the other spouse (the respondent). The petitioner does not need the respondent’s signature to open the case. If both spouses agree, the process moves faster. If they don’t, the case still moves.
A spouse who opposes the annulment can file an answer disputing the allegations, which turns the matter into a contested case. The petitioner then carries the burden of proving the marriage meets the grounds for nullity. Opposition slows the process and raises the stakes at the hearing, but it does not give the respondent a veto. If the evidence is sufficient, the judge grants the annulment over the objection.
A spouse who ignores the petition entirely does not block it either. When the respondent fails to file a response within the deadline, the petitioner can ask the court for a default judgment. The judge still reviews the petition and evidence to confirm valid grounds exist before signing the decree, but silence is treated as absence, not refusal.
What You Actually Have to Prove
Because consent isn’t the issue, grounds are. Courts split annulment grounds into two categories, and the category changes what you need to show.
Void Marriages
A void marriage was never legally valid in the first place. The two most common examples are bigamy, where one spouse was already married to someone else, and incest, where the spouses are close blood relatives. These marriages are treated as if they never existed, and either spouse (and sometimes a third party) can ask a court to confirm the marriage is void. There is generally no filing deadline for void marriages.
Voidable Marriages
A voidable marriage is treated as valid until a court says otherwise. Grounds vary by state but commonly include:
- Fraud that goes to the core of the marriage, such as deception about the ability or willingness to have children. Minor lies and broken promises generally don’t qualify.
- Duress, meaning one spouse was forced or threatened into the marriage.
- Mental incapacity at the time of the ceremony, so that one spouse could not understand what they were agreeing to.
- Underage marriage without proper court approval.
- Permanent physical incapacity to consummate the marriage that the other spouse did not know about before the wedding.
Evidence requirements track the ground. For bigamy, a certified copy of the earlier marriage certificate often settles the question. For mental or physical incapacity, medical records from around the time of the ceremony are typically needed. For fraud, text messages, emails, medical records, or witness testimony showing what was represented and what the truth was will strengthen your case. The stronger your evidence, the less your spouse’s cooperation matters.
Why Waiting for Your Spouse to Agree Can Cost You the Case
Voidable marriages carry strict time limits, and holding out for your spouse’s agreement is a bad strategy. If you wait too long, a court can refuse to grant the annulment even when valid grounds existed.
Deadlines vary by state and by the ground you claim. Fraud-based annulments often must be filed within a set period, commonly one to four years, after the deceived spouse discovers the fraud. Underage-marriage annulments typically must be filed within a few years of the minor reaching adulthood. Physical incapacity claims often run from the date of the marriage itself.
There is also a second clock. Continuing to live with your spouse after you learn about the problem can destroy your right to an annulment. Many states treat voluntary cohabitation after discovery as ratification, meaning you’ve accepted the marriage despite its flaws. A spouse who stalls, promises to cooperate later, or asks you to “give it more time” may be running out your clock, whether or not they intend to. If you have grounds, act on them.
Serving an Uncooperative Spouse
Once your petition is filed, the court issues a summons that must be formally delivered to your spouse. This step, called service of process, exists precisely for the situation where the respondent is not cooperating. It ensures they receive notice and a fair chance to respond, which is what lets the case move forward without their agreement.
A sheriff’s deputy, a professional process server, or in some jurisdictions certified mail can handle delivery. If your spouse is willing to cooperate, they can sign a waiver of service, which skips the formal delivery step. If they aren’t, hiring a process server is the standard path, and it does not require your spouse’s permission.
You file the petition with the clerk of the court in the appropriate jurisdiction. Filing fees vary and typically run in the range of a few hundred dollars depending on county and state. Fee waivers are available in many courts for those who can’t afford the cost. Residency rules also differ by state; some states apply less strict residency requirements for annulments than for divorces, and a few impose none at all for annulment cases. Check your local court’s rules before you file.
What Happens After You File
The respondent typically has 20 to 30 days to file a written response, depending on jurisdiction. Three outcomes are possible, and none of them require agreement.
If the respondent files nothing, the petitioner can request a default judgment. The judge reviews the petition and supporting evidence to confirm proper grounds, then signs the decree. If the respondent files an answer and contests the case, it proceeds to a hearing where both sides present evidence and testimony. Contested annulments can take several months from filing to final decree, and attorney fees run significantly higher than for an uncontested case. If the respondent agrees or signs a waiver, the case moves quickly to a short hearing or paperwork review.
If the Judge Denies the Annulment
If the court decides you haven’t proven valid grounds, the petition is denied. You are not trapped. In most jurisdictions you can file an amended petition converting the case to a divorce or legal separation, which does not require the same grounds. You may also have the option to appeal, though appeals add time and expense. Talking to a family law attorney before choosing between amending and appealing is worthwhile.
Religious Annulment Is a Separate Process
One point worth clearing up, because people often assume the two tracks are linked: a civil annulment and a religious annulment are entirely separate. A civil annulment is a court order under state law and is the only one that changes your legal marital status. A religious annulment, such as a Catholic declaration of nullity, is granted by a faith institution and affects only your standing within that community. Getting one does not get you the other, and the consent rules, grounds, and procedures described here apply only to the civil process. If you need both, you pursue each separately through the appropriate authority.