Sham marriage offences are treated seriously under the law in England and Wales and can lead to both criminal prosecution and immigration enforcement action. In many cases, individuals only become aware of the legal implications when a marriage is investigated by the Home Office or when they are contacted as part of a criminal investigation. At that stage, the consequences can include arrest, formal interviews, restrictions on immigration status and the risk of a custodial sentence.

There is often confusion about what constitutes a sham marriage or civil partnership. Many people assume the issue only arises where there is clear fraud or organised criminal activity, but the law can apply more broadly. Entering into a marriage or civil partnership to circumvent UK immigration controls, even where there is some level of personal relationship, may still fall within the scope of a criminal offence depending on the circumstances.

In this guide, the criminal defence solicitors at Tyler Hoffman explain the legal definition of a sham marriage, the offences that may arise from this and the sentencing guidelines that courts apply. We also outline what happens if you are investigated and how we can defend and mitigate your position should you be accused.

What is a sham marriage under the law in England and Wales?

A sham marriage is a marriage or civil partnership entered into to get around UK immigration rules, rather than because the couple are in a genuine relationship.

The concept is rooted in UK immigration law, particularly under the Immigration Act and related legislation. While there is no single standalone criminal offence labelled “sham marriage,” such arrangements are frequently linked to wider immigration offences and fraud-related conduct.
A marriage or civil partnership may be considered a sham where:

• One or both parties do not intend to live together as partners.
• The relationship exists primarily to obtain an immigration advantage, such as entry clearance or settled status.
• There is evidence of financial arrangements or third-party involvement.

They are not always easy to detect, but the authorities actively investigate situations where there are concerns about whether a relationship is genuine. This can include sham civil partnerships as well as traditional marriages.

What offences can arise from a sham marriage?

Sham marriage cases rarely involve a single legal issue. Instead, they are often prosecuted under a combination of criminal and immigration offences, depending on the facts, including:

• Assisting unlawful immigration, where an individual helps another person breach immigration control.
• Fraud by false representation, particularly where false information is provided to obtain an immigration benefit.
• Identity fraud, where false documents or identities are used.
• Conspiracy offences, especially in cases involving multiple individuals or organised activity.

In more serious cases, sham marriages may form part of wider criminal activity involving organised crime groups. These cases are treated more severely by the courts, particularly where there is clear evidence of financial gain or repeated offending.

The level of involvement is a key factor in these cases. Someone who is alleged to have organised or facilitated multiple such marriages will be treated very differently to an individual accused of participating in a single arrangement. If you are, or believe you soon will be, under investigation, we strongly advise you to contact us at the earliest opportunity. We will review the evidence, challenge any suggestion that you played a leading role, and ensure that your position is accurately presented to the police, the Crown Prosecution Service and, if necessary, the court.

How are sham marriage cases investigated?

Sham marriage cases are typically identified through immigration compliance checks, intelligence gathering or referrals from registrars who have reasonable suspicions about a proposed marriage or civil partnership.

Investigations may involve:

• Interviews conducted by immigration officers.
• Examination of documents, including marriage certificates and immigration records.
• Surveillance or monitoring of the individuals involved.
• Financial investigations to identify payments or organised arrangements.
• Collection of further evidence, including communications and witness statements

Where sufficient evidence is gathered, the case may be referred to the Crown Prosecution Service (CPS), which will decide whether there is a realistic prospect of conviction and whether prosecution is in the public interest.

At this stage, the matter becomes a formal criminal investigation, and individuals involved may be arrested or invited to attend a voluntary interview under caution. If you have been invited to attend such an interview, you should be aware that even a voluntary interview is a formal part of the investigation process, and anything you say may be used as evidence. For that reason, you should never attend without legal representation from an experienced criminal defence solicitor. Without legal advice, you risk making serious mistakes, including providing incomplete answers, making assumptions, or unintentionally strengthening the case against you.

What are the sentencing guidelines for sham marriage offences?

There are no standalone sentencing guidelines specifically for “sham marriage” offences. Instead, courts sentence these cases under existing frameworks, most commonly for offences such as fraud or assisting unlawful immigration.

In practice, this means the court will assess both culpability (how involved you were) and harm (the impact of the offence) when deciding sentences.

When determining a sentence, the court will consider:

• The role played by the defendant (for example, organiser, facilitator or participant).
• The level of planning and sophistication involved.
• Whether there was financial gain.
• The number of individuals involved or affected.
• The impact on the UK immigration system.

Sentences vary significantly depending on these factors. Where an individual is found to have played a leading role, particularly in cases involving organised activity or financial benefit, the court is likely to impose a custodial sentence. These range from custodial sentences of several months to multiple years in cases involving organised activity or repeated offending.

In contrast, where involvement is limited, there is no financial gain, and the offence is isolated, the court may impose a suspended sentence, a community order or a financial penalty.

The court will also consider whether the offence forms part of a wider pattern of criminal activity, as well as any personal mitigation, when deciding the appropriate sentence.

What factors can aggravate or reduce a sentence?

Sentencing decisions are heavily influenced by aggravating and mitigating factors.

Aggravating factors may include:

• Involvement in organised crime groups
• Significant financial gain
• Repeated or large-scale offending
• Exploitation of vulnerable individuals
• Abuse of a position of trust

These factors can increase the seriousness of the offence and lead to a more severe sentence.

Mitigating factors may include:

• Limited or minor involvement
• No financial benefit gained
• Cooperation with investigators
• Lack of previous convictions
• Personal circumstances affecting the individual’s actions

In some cases, the court may also consider whether there was a reasonable excuse or whether the individual’s involvement was less deliberate than initially alleged. This might include situations where a person did not fully understand the immigration implications of the arrangement, had limited involvement or was not aware of any wider organised activity.

What to do if you are accused of a sham marriage offence

If you are accused of involvement in a sham marriage, it is important to act quickly and carefully.

You should:

• Seek legal advice at the earliest opportunity.
• Avoid engaging with investigators without representation.
• Preserve any relevant documents or communications.
• Follow your solicitor’s advice when responding to allegations.

Sham marriage cases can develop quickly, and early decisions can influence both the criminal and immigration outcomes. At Tyler Hoffman, we have extensive experience in defending clients facing serious criminal and immigration-related allegations. We understand how sham marriage investigations are conducted and how the courts approach sentencing in these cases.