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How you can have a marriage annulled, the reasons you can give for annulling a marriage and the forms you will need to apply for an annulment. This includes information from the withdrawn D191 guide.

• When you can annul a marriage

  Annulment (sometimes known as ‘nullity’) is a different way of ending a…

• Before you apply

  You and your husband or wife can choose to work out: arrangements for…

• Apply for an annulment

  You can apply to have your marriage annulled as soon as you get married.…

• Apply for a conditional order or decree nisi

  The other person must respond to your nullity application within 14 days,…

• Apply for a final order or decree absolute

  6 weeks after you get the conditional order or decree nisi you can apply…

Work out whether you can claim Married Couple's Allowance (MCA) and find out how much you could get taken off your tax bill

How to stop or start paying the reduced rate of National Insurance (NI) as a married woman or widow, how it affects your benefits.

Check you can get a divorce, agree or disagree with a divorce application, what to do if your husband or wife lacks mental capacity.

What British nationals need to do to get married in Thailand, including what documents are needed.

• Updated: 6 November 2025

Marriage Allowance allows you to transfer some of your Personal Allowance to your husband, wife or civil partner: what you get and how to apply for free.

How to tell HMRC if there's a change to your personal details - address, name, income, marital status, gender

Age-related tax allowance, calculating tax if you carry on working, National Insurance payments

Application form to order a marriage certificate for a marriage that was registered overseas.

To change your name or other personal details on your passport, send the standard passport application form with evidence about the change