What Happens at a CMS Liability Order Hearing in the UK?

 

If you fall into arrears with the Child Maintenance Service (CMS), the case can escalate to court.

This usually takes the form of a liability order hearing.

But many people ask:

👉 What actually happens at a CMS liability order hearing?
👉 Can the court check if the arrears are correct?

Understanding this process is critical—because it highlights how enforcement and disputes operate separately within the system.

What Is a CMS Liability Order?

A liability order is a legal step that allows the CMS to:

  • formally recognise a debt as payable
  • pursue stronger enforcement action
  • apply for measures such as:
    • bailiffs
    • charging orders
    • further court-based enforcement

Once granted, it significantly increases the CMS’s ability to recover arrears.

What Happens at the Hearing?

A liability order hearing usually takes place in the magistrates’ court.

At the hearing:

  • The CMS presents the amount it says is owed
  • The court considers whether:
    • the amount has been calculated
    • the correct process has been followed

👉 The hearing is typically short and procedural

⚠️ What the Court Does Not Do

This is the critical point.

At a liability order hearing:

👉 The court does not normally re-examine the underlying maintenance calculation.

This reflects the structure of the system:

  • Disputes about calculations → handled through:
    • Mandatory Reconsideration
    • First-tier Tribunal
  • Enforcement of arrears → handled through:
    • liability orders
    • enforcement powers

👉 These are separate legal pathways .


 ________________________________________________________________________

Is There a Way to Challenge a CMS Liability Order?

A liability order is not the same as a Child Maintenance Service calculation decision, and the route to challenge it is different.

If the arrears themselves are disputed, the main route remains the CMS decision-making and appeal process, including Mandatory Reconsideration and, where appropriate, appeal to the First-tier Tribunal.

However, there is also a separate and more limited route in relation to the liability order itself.

In Donaghy v Department for Work and Pensions (2018), the court confirmed that a liability order can be challenged by way of appeal under section 111A of the Magistrates’ Courts Act 1980. This is not a full rehearing of the arrears. It is a narrower route concerned with legal error, jurisdiction, or whether the liability order should proceed in the circumstances.

Importantly, the case also highlights a practical point: where the underlying liability is being actively challenged, the question may arise whether enforcement proceedings should be adjourned or delayed until that dispute has been dealt with properly.

This reflects the structure of the system, where disputes about the amount owed are dealt with through the CMS and tribunal process, while enforcement is pursued separately through the courts.

__________________________________________________________________________

The Structural Issue

This creates a key tension:

  • A person may dispute the amount of arrears
  • But enforcement can still proceed through the courts

👉 In effect:

The court is being asked to enforce a debt that may still be in dispute elsewhere in the system

How Enforcement Escalates

Once a liability order is granted, enforcement can escalate quickly.

This may include:

  • Deduction from earnings orders
  • Direct deductions from bank accounts
  • Use of enforcement agents (bailiffs)
  • Further legal action affecting property or assets

👉 At this stage, the focus shifts from whether the amount is correct
👉 to recovering the amount recorded

The Role of CMS Guidance

Internal guidance (Decision Makers’ Guidance) indicates that:

  • enforcement should follow structured checks
  • decisions should be based on available evidence
  • cases should be up to date before action is taken

👉 This suggests enforcement should be applied carefully and consistently.

Where Disputes Fit In

Disputes about arrears can arise from:

  • calculation errors
  • missing payments
  • historical adjustments
  • administrative issues

However:

👉 These disputes are handled through separate processes, not the liability order hearing itself.

A Question of Fairness

This leads to an important question:

👉 Should enforcement through the courts proceed while the amount itself is still being challenged?

The system provides routes to challenge decisions.

But those routes operate alongside—not within—enforcement proceedings.

How This Connects to Challenging Arrears

If you are disputing arrears, the correct route is:

👉 Mandatory Reconsideration
👉 Appeal to the tribunal

For a full guide, see:
How to Challenge Child Maintenance Arrears in the UK

Enforcement vs Dispute (Read More)

This issue is explored further here:
👉 Should CMS Enforcement Be Paused When Arrears Are Disputed?

Conclusion

A CMS liability order hearing is not a full review of your case.

It is a procedural step focused on enforcement.

👉 The key issue is not whether enforcement powers exist
👉 but how they operate alongside unresolved disputes

Until those two parts of the system align more clearly in practice, the distinction between:

  • establishing liability
  • and enforcing it

remains a central feature of how the system operates.


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