What Is a Marriage Annulment and Is It Possible in Australia?

Can a marriage be annulled in Australia?

Yes, but only in limited circumstances. An annulment is not an alternative to divorce simply because a marriage was brief, unhappy, never consummated or regretted soon after the wedding.

To obtain a marriage annulment in Australia, you must establish that the marriage was legally invalid from the beginning.

This distinction matters. A divorce ends a valid marriage. An annulment, formally called a decree of nullity, is a finding that no valid legal marriage existed between the parties, even though a wedding ceremony may have taken place.

Before filing an application, it is sensible to obtain advice from an experienced family lawyer. Nullity cases can involve difficult questions about consent, previous marriages, overseas law, evidence and related financial matters.

What Is a Marriage Annulment in Australia?
Who Can Apply?
Annulment vs Divorce
Grounds for a Marriage Annulment
- Existing Marriage
- Prohibited Relationship
- Invalid Marriage Procedure
- Lack of Real Consent
- Underage Marriage
What Is Not a Ground for Annulment?
Evidence Required
How to Apply for an Annulment
Costs and Timeframes
Property Settlement After Annulment
Children and Parenting Arrangements
Overseas and Religious Marriages
Frequently Asked Questions

What Is a Marriage Annulment in Australia?

Under section 51 of the Family Law Act 1975, the Federal Circuit and Family Court of Australia may make a decree of nullity.

The legal grounds for finding a marriage void are principally set out in sections 23 and 23B of the Marriage Act 1961.

A decree of nullity means the Court has determined that there was no legal marriage between the parties. That is different from the usual divorce process in Australia, which recognises that a valid marriage existed but has irretrievably broken down.

The central question in an annulment case is not whether the marriage failed. It is whether the marriage was legally valid when it was entered into.

Who can apply?

The Court must have jurisdiction to hear the application. Generally, either party must:

be an Australian citizen
regard Australia as their permanent home and live in Australia
ordinarily live in Australia and have done so for at least 12 months before filing

Where the marriage took place overseas, one party lives overseas or another country has already dealt with the marriage, the position may be more complex. Advice from a lawyer experienced in international family law may be required.

Annulment vs Divorce in Australia

An annulment and a divorce have different legal purposes.

An annulment declares that the marriage was invalid from the outset. There is no requirement to prove 12 months of separation, but the applicant must establish one of the narrow legal grounds for nullity.

A divorce ends a legally valid marriage. Australia has a no-fault divorce system, so the Court does not decide who caused the relationship to end. The main requirement is that the marriage has broken down irretrievably, usually shown by at least 12 months of separation.

Issue	Annulment	Divorce
Legal effect	Declares the marriage void	Ends a valid marriage
Main question	Was the marriage legally valid?	Has the marriage broken down irretrievably?
Separation period	No 12-month requirement	Usually 12 months
Evidence	Proof of a specific ground of invalidity	Proof of marriage and separation
Property and parenting	Dealt with separately	Dealt with separately

What Are the Grounds for an Annulment?

A marriage may be void where:

one party was already legally married
the parties were in a prohibited relationship
the marriage did not comply with the applicable legal requirements
one party did not give real consent
one party was not of marriageable age

These are strict statutory grounds. Regret, incompatibility or disappointment after the wedding is not enough.

1. One party was already married

A marriage is void if either party was still legally married to another person when the later ceremony occurred.

This may happen where a previous divorce had not yet become final, an existing marriage was concealed, a foreign divorce was not recognised in Australia or a former spouse was mistakenly believed to be dead.

Bigamy may also have criminal consequences. Section 94 of the Marriage Act makes it an offence for a married person to go through a marriage ceremony with another person, subject to limited exceptions.

Anyone who discovers that their spouse may already have been married should obtain legal advice before making allegations or taking further steps.

2. The parties were in a prohibited relationship

A marriage is void where the parties are within a prohibited family relationship.

This generally includes marriages between:

a person and an ancestor
a person and a descendant
siblings, including half-siblings

The Marriage Act also contains provisions dealing with relationships created through adoption.

This ground is uncommon, but it remains an express basis for a decree of nullity.

3. The marriage did not comply with the applicable law

A marriage may be invalid if it failed to comply with the law governing the marriage in the place where it occurred.

However, not every technical defect makes a marriage void. The Marriage Act preserves the validity of some marriages despite procedural errors, particularly where the parties genuinely believed the celebrant was authorised.

Relevant questions may include:

where the ceremony took place
which country’s law applied
who conducted the ceremony
whether the required form of marriage was followed
whether the parties intended to enter a legally binding marriage
whether Australia recognises an overseas marriage or divorce

4. One party did not give real consent

A valid marriage requires real consent from both parties.

Consent may not be real where it was affected by:

duress
fraud
a mistake about the identity of the other party
a mistake about the nature of the ceremony
mental incapacity to understand the nature and effect of the marriage ceremony

This is one of the most complex areas of annulment law.

Duress

Duress requires more than ordinary family pressure, emotional conflict or reluctance.

The question is whether a person’s will was overborne to such an extent that their participation was not the product of free and genuine consent.

Evidence may involve threats of violence, threats against relatives, confiscation of travel documents, financial control, immigration pressure, isolation or severe cultural and familial pressure.

Fraud

Not every lie told before a wedding amounts to fraud for the purpose of annulment.

A spouse may have lied about money, employment, fidelity, their past or their intentions. Those matters may be serious, but ordinary dishonesty does not automatically make a marriage void.

The deception must affect real consent in the legally recognised sense. The exact lie, what the applicant believed and how it affected the decision to marry must be proved through admissible evidence.

Mistake about identity or the ceremony

A marriage may be void where a person was mistaken about the identity of the person they were marrying.

It may also be void where a person did not understand that the event was a marriage ceremony. For example, they may have believed they were attending an engagement, cultural celebration or administrative appointment rather than entering a legal marriage.

A mistake about a spouse’s character, finances or motives is not the same as a mistake about identity.

Mental incapacity

A person must be capable of understanding the nature and effect of the marriage ceremony.

The question is whether, at the relevant time, the person understood that they were entering a marriage and the essential nature of that commitment.

Medical records, specialist evidence and witness evidence may be important.

5. One party was not of marriageable age

The general marriageable age in Australia is 18.

In exceptional circumstances, a person aged 16 or 17 may marry an adult if the required Court authorisation and consents are obtained. Two people under 18 cannot marry each other under Australian law.

A marriage may therefore be void where one party was underage and the necessary approvals were absent.

What Is Not a Ground for Annulment?

The Court will not declare a marriage void merely because:

the marriage was not consummated
the parties never lived together
the relationship was very brief
one spouse was unfaithful
the parties were incompatible
one person regretted the wedding
the couple separated immediately
family violence occurred during the relationship

Family violence may support a claim of duress and justify urgent protective action. However, violence arising after a valid marriage does not retrospectively invalidate it.

Speak to a family Lawyer today

The more detail you provide, the better we can assess your enquiry and direct it to the right person.

Anyone facing threats, coercion or abuse can read more about domestic and family violence protections in Queensland.

What Evidence Is Needed?

The applicant must prove the facts relied upon. The evidence will depend on the ground alleged, but may include:

marriage certificates
earlier divorce orders
evidence showing when a divorce became final
overseas marriage or divorce records
birth or adoption records
immigration documents
text messages and emails
evidence of threats or coercion
police and medical records
witness affidavits
evidence from the celebrant
expert medical evidence concerning capacity

The supporting affidavit should identify the legal ground and set out the facts that prove it. Evidence should be preserved early because messages, witnesses and foreign records may become harder to obtain.

How to Apply for a Marriage Annulment

The current procedure is set out in the Federal Circuit and Family Court of Australia’s Nullity and Validity of Marriage Practice Direction.

1. File an Initiating Application

A nullity proceeding starts with an Initiating Application in Family Law seeking a decree that the marriage is a nullity.

A nullity application generally cannot be combined with parenting or financial orders in the same proceeding.

2. Prepare a supporting affidavit

The affidavit should address:

the time, place and form of the ceremony
the facts relied upon
the precise ground on which the marriage is said to be void
whether the respondent lives in Australia or overseas
the documents and evidence supporting the application

3. File the marriage certificate

A copy of the marriage certificate should ordinarily be filed. If it is not in English, a translation and translator’s affidavit may be required.

Where a certificate cannot be obtained, further evidence may be needed.

4. Pay the filing fee

Court fees change, so the current family law fee schedule should be checked before filing.

5. Serve the respondent

The filed documents must be formally served on the other party. The applicant cannot personally serve them.

If the respondent is overseas or cannot be found, additional procedural steps may be necessary.

6. Attend the hearing

The other party does not need to agree to the annulment. They may oppose the application and file their own evidence.

Even where the application is unopposed, the Court must be satisfied that a legal ground has been proved. A decree of nullity is not an administrative formality.

How Long Does an Annulment Take?

There is no fixed timeframe.

The length of the case may depend on whether:

the respondent can be located
service must occur overseas
the application is contested
foreign records are required
expert evidence is needed
the facts involve duress, fraud or capacity
the Court requests further evidence

Is There a Time Limit?

There is no 12-month separation period before applying for a decree of nullity.

However, delay may make the case harder to prove. Records may disappear, memories may fade and witnesses may become unavailable.

An application for property adjustment or spousal maintenance will generally need to be commenced within 12 months after the decree of nullity.

Does an Annulment Decide Property Settlement?

No.

A decree of nullity determines the validity of the marriage. It does not automatically divide property, transfer a home, split superannuation or allocate debts.

The Court may still make financial orders in relation to a void marriage. Relevant property may include:

real estate
bank accounts
superannuation
businesses and trusts
overseas assets
debts
inheritances

An annulment does not necessarily allow either person to keep everything held in their own name.

For further guidance, see our information on property settlements and common property settlement questions after separation.

Does an Annulment Affect Children?

An annulment does not determine parenting arrangements.

Questions about where children live, how much time they spend with each parent and who makes major decisions are dealt with separately. The Court’s focus remains the child’s best interests.

The validity of the parents’ marriage does not remove the child’s rights or either parent’s responsibilities.

Our guide to parenting plans and parenting orders explains the main options.

Can an Overseas Marriage Be Annulled in Australia?

Potentially, yes, where the Australian Court has jurisdiction.

An overseas marriage may raise questions about:

the law of the country where it occurred
whether either party had capacity to marry
recognition of an earlier foreign marriage or divorce
compliance with local ceremony requirements
recognition of the marriage under Australian law
whether an Australian decree will be recognised overseas

Foreign certificates, translations and expert evidence about overseas law may be required.

Can a Religious Marriage Be Annulled?

A civil decree of nullity and a religious annulment are different.

The Court determines whether a marriage is legally valid under Australian law. A church or religious tribunal may apply its own rules when deciding whether a marriage is recognised within that faith.

A religious annulment does not necessarily change civil marital status, and a civil decree may not resolve religious status.

Frequently Asked Questions

Can I get an annulment because my spouse cheated?

Usually not. Infidelity does not itself make a marriage legally invalid.

Can I annul a marriage because we separated immediately?

No. A marriage may remain valid even if the parties separated on the wedding day or never lived together.

Can I annul a marriage because it was never consummated?

No. Non consummation is not a ground for civil annulment in Australia.

Can I annul a marriage because my spouse lied?

It depends on the nature and legal effect of the lie. Many serious deceptions do not satisfy the narrow test for fraud affecting real consent.

Do both spouses have to agree?

No. One party may apply, but the respondent must be served and given an opportunity to oppose the application.

Can I remarry after an annulment?

Once a decree of nullity has been made, the purported marriage is treated as void. However, no one should arrange another marriage until their legal status is certain.

Is an annulment cheaper than a divorce?

Not necessarily. The Court filing fee is higher, and legal costs may increase where extensive evidence or a contested hearing is required.

Speak to a Family Lawyer About Marriage Annulment

Determining whether a marriage is void can involve complex issues of consent, overseas marriages, previous divorces and family law jurisdiction. If you believe your marriage may have been legally invalid from the outset, obtaining advice early can help preserve evidence and clarify your options.

Emerson Family Law’s experienced family lawyers in Brisbane advise on annulment, divorce, property settlements, parenting disputes and international family law matters.

You can request a confidential consultation to discuss whether a decree of nullity may be available in your circumstances.