Official Tribunal, Evidence & Accountability Routes
The sections below add current GOV.UK, HMCTS, DWP and primary-law links to support the handbook.
Mandatory Reconsideration Usually Comes First
For an appealable CMS payment decision, GOV.UK says you normally need to ask CMS for Mandatory Reconsideration before appealing to the Social Security and Child Support Tribunal. CMS says the MR request must normally be made within 30 days of the date on the decision letter.
CMS complaints & appealsUse Form SSCS2 for a Child Maintenance Appeal
HMCTS currently requires Child Maintenance appeals submitted by post to use Form SSCS2. GOV.UK specifically says Child Maintenance decisions cannot be appealed through the normal online appeal route.
Download SSCS2 How to submit the appealTribunal Appeal Deadline
GOV.UK says an appeal should normally be made within one month of receiving the Mandatory Reconsideration decision. If it is late, explain the delay; acceptance is not guaranteed.
Official appeal guidanceIndependent Tribunal & No Appeal Fee
The Social Security and Child Support Tribunal is supported by HMCTS and is independent of government. GOV.UK confirms there is no fee to make this type of appeal.
Tribunal overviewEvidence Can Be Added After the Appeal
After submission, HMCTS says the department that made the decision will send its response explaining why it made the decision, and you will receive a copy. You can then provide further evidence and statements to support the appeal.
HMCTS also allows an appeal-management account to track progress and upload evidence after registration.
After submitting an appealDWP SAR: Obtain the CMS Records
DWP says a Subject Access Request can include your Child Maintenance Service account information, evidence used in a dispute or investigation, and other personal information held about you.
This is particularly useful when building a chronology, checking case notes, tracing payments or understanding the evidence CMS relied upon.
DWP Subject Access RequestDirect Pay Records Matter
Current GOV.UK CMS payment guidance tells Direct Pay users to keep a record of payments. If a payment is disputed or missed, a bank statement may be needed.
Use clear references and preserve statements, standing-order records and transfer confirmations.
CMS payments guidanceYou Can Have a Representative
HMCTS says anyone can be appointed as a representative, including a friend or family member. A representative can help prepare evidence, submit the appeal, advise you and act on your behalf.
Representative guidanceReasonable Adjustments & Hearing Support
HMCTS can provide reasonable adjustments for disabled tribunal users. Support may include accessible rooms, BSL interpretation, hearing equipment, large-print documents or breaks during a hearing.
HMCTS reasonable adjustments At the hearingTribunal Procedure Rules
The Social Security and Child Support Tribunal operates under the Tribunal Procedure (First-tier Tribunal) (Social Entitlement Chamber) Rules 2008, as amended. The rules cover appeal procedure, hearings, evidence, case management and decisions.
Current consolidated rules Legislation.gov.ukCore Child Maintenance Legislation
The Child Support Act 1991 provides the primary statutory framework. The Child Support Maintenance Calculation Regulations 2012 contain key rules for modern CMS calculations, including income and calculation provisions.
Child Support Act 1991 2012 Calculation RegulationsIf the First-tier Tribunal Gets the Law Wrong
If you disagree with the tribunal decision, GOV.UK says you may be able to ask for it to be set aside for a procedural problem or appeal to the Upper Tribunal where there is an error of law, such as failing to apply the law properly or give adequate reasons.
After the tribunal decisionSuggested Tribunal Evidence Pack Structure
This is practical organisational guidance to make a complex CMS case easier to follow.
Important: Do Not Redact Information the Tribunal Needs
Protect unrelated sensitive information where appropriate, but avoid removing dates, transaction references, account identifiers, payroll information or other details needed to verify the issue in dispute. If you are unsure what should be redacted, ask HMCTS or obtain advice before filing the document.
Important Pension Evidence Clarification
Pension treatment can depend on how contributions are made and how taxable income is recorded. Do not assume every pension contribution should simply be subtracted again from a payslip figure. Provide the payslip, pension statement and contribution history so CMS or the tribunal can see how the contribution was actually treated.
Official CMS calculation and pension guidance ↗Important: Evidence “Weight” Is Case-Specific
The supplied handbook ranks some documents as stronger or weaker evidence. That is useful practical guidance, but a tribunal does not apply a fixed universal ranking. The weight given to a document depends on the issue, authenticity, context, consistency and the other evidence in the case.
Official Evidence, Tribunal & Accountability Sources
Tribunal Evidence & Accountability Handbook
The complete detailed handbook is preserved below.
CMS Tribunal Evidence & Accountability Handbook
A Practical Guide to Challenging Child Maintenance Decisions
Purpose
This guide is designed to help any parent involved with the Child Maintenance Service (CMS) prepare evidence, understand their rights, challenge errors, and present a clear and professional case before a tribunal.
It is particularly useful where disputes involve:
- Incorrect arrears
- Missing payments
- Shared care disagreements
- Income calculations
- Pension contributions
- Direct Pay disputes
- Variations and diversion of income allegations
- Failure by CMS to consider evidence
- Procedural unfairness
1. Know Your Rights
Right to Reasons
You have the right to request:
- A full explanation of a CMS decision.
- Copies of calculations.
- Evidence relied upon.
- Notes of decision-making.
Relevant framework:
- Child Support Act 1991
- Child Support Maintenance Calculation Regulations 2012
- Data Protection Act 2018
- UK GDPR
Right to Mandatory Reconsideration
Before appealing to a tribunal you normally must request a Mandatory Reconsideration (MR).
The MR should identify:
- Errors of fact
- Errors of law
- Missing evidence
- Procedural unfairness
2. Understanding the Tribunal
The tribunal is independent of CMS and the Department for Work and Pensions.
Tribunal judges commonly focus on:
Evidence
Can the claim be proven?
Credibility
Are records consistent?
Documentation
Is there contemporaneous evidence?
Legal Basis
What regulation supports the argument?
Chronology
Can events be followed clearly?
Building a Tribunal Evidence Pack
Section 1 – Cover Page
Include:
- Name
- National Insurance number (partially redacted)
- CMS case reference
- Tribunal reference
- Hearing date
Section 2 – Evidence Index
Example:
Section
Description
Pages
A
Chronology
1-10
B
Bank Statements
11-60
C
Payroll Records
61-90
D
Shared Care Evidence
91-130
E
Pension Contributions
131-145
F
CMS Correspondence
146-200
G
Arrears Audit
201-240
Section 3 – Chronology
Create a timeline.
Example:
Date
Event
Evidence
Date
Direct Pay started
CMS Letter B1
Date
Amount of payment made
Bank Statement C3
Date
CMS informed
Email D2
Date
CMS records arrears
Decision Letter E4
Date
Tribunals value chronologies because they simplify complex cases.
Bank Statement Preparation
Good Practice
Highlight:
- Child maintenance payments
- References used
- Standing orders
- Faster payments
Provide:
- Original statement
- Highlighted copy
- Summary spreadsheet
Avoid:
- Cropping statements
- Editing transactions
- Redacting relevant entries
Direct Pay Payment Tracing
Where CMS alleges missed payments:
Create a payment schedule.
Date
Amount
Bank Reference
Evidence
Then compare against CMS records.
Many disputes arise because:
- Payments lack references
- CMS records are incomplete
- Historical records are missing
Shared Care Evidence Bundle
Useful evidence includes:
School Records
- Collection logs
- Attendance records
- Parent communications
Medical Records
- Appointment attendance
- Registration information
Digital Evidence
- Calendar records
- Parenting apps
- Travel bookings
Third-Party Evidence
- Teachers
- Childcare providers
- Family support workers
Photographs
Useful only when dated and supported by other evidence.
Payroll Evidence
Include:
Payslips
Preferably 12 months.
P60
Demonstrates annual earnings.
P11D
Shows taxable benefits.
Employment Contract
Where relevant.
HMRC Records
Useful where CMS calculations differ.
Pension Contribution Evidence
Where pension contributions reduce assessable income:
Provide:
- Pension statements
- Employer confirmations
Payslips
- Contribution history
Tribunals often consider:
- Consistency of contributions
- Retirement planning rationale
- Whether contributions appear genuine
A long-standing pension pattern is generally stronger evidence than a sudden increase after a CMS dispute begins.
Arrears Audit Method
One of the most effective exercises.
Create a spreadsheet showing:
Month
CMS Expected
Paid
Difference
Then compare against:
- CMS account statements
- Bank statements
- CMS decision letters
Common findings include:
- Duplicate charges
- Missing credits
- Wrong effective dates
- Incorrect shared care calculations
Cross-Referencing CMS Records
Create an evidence map.
Example:
CMS Claim
Your Evidence
Payment not received
Bank Statement B12
Shared care denied
School records D5
Income disputed
HMRC records E7
Arrears owed
Audit spreadsheet F3
This allows the tribunal to verify evidence quickly.
Evidence Standards
The tribunal generally considers:
Relevance
Does it prove the issue?
Reliability
Can it be independently verified?
Consistency
Does it match other evidence?
Weight
How persuasive is it?
Strongest evidence:
- HMRC records
- Bank statements
- Official correspondence
- Payroll records
- Third-party records
Weaker evidence:
- Unsupported statements
- Screenshots without context
- Undated documents
When CMS Appears to Ignore Evidence
Keep records of:
- Evidence submitted
- Dates submitted
- Upload confirmations
- Recorded delivery receipts
- Telephone notes
Request:
- Decision reasons
- Case notes (subject access request if appropriate)
- Mandatory reconsideration
A tribunal can consider evidence even where CMS previously gave it little weight.
Advanced Claimant Protection & Accountability
Where serious concerns arise:
Subject Access Request (SAR)
Request:
- Case notes
- Internal records
- Decision logs
- Contact records
Through:
Department for Work and Pensions SAR Information
Complaint Process
- CMS Complaint
- Independent Case Examiner (ICE)
- Parliamentary and Health Service Ombudsman
Useful links:
CMS Complaints Process
Independent Case Examiner
- Parliamentary and Health Service Ombudsman
Key Legislation & Regulations
Relevant legal framework includes:
- Child Support Act 1991
- Child Support Maintenance Calculation Regulations 2012
- Data Protection Act 2018
- UK General Data Protection Regulation
- Department for Work and Pensions guidance and decision-making procedures.
Tribunal Judge's Checklist
Before the hearing ask yourself:
Have I produced a chronology?
Have I indexed every document?
Have I traced every payment?
Have I proved shared care with independent evidence?
Have I reconciled my figures against CMS figures?
Have I provided pension evidence?
Have I identified exactly where CMS may have made an error?
Can a stranger understand my case in 10 minutes?
If the answer is yes, your evidence pack is likely to be far more persuasive than a large bundle of unstructured documents. A well-indexed, cross-referenced bundle often carries more weight than hundreds of pages of evidence presented without explanation.
Right First Time UK
Fair Decisions. Public Money. Real Accountability.