A strong complaint makes it easy to see what happened, what is wrong and what would put it right.
A complaint does not become stronger simply by becoming longer. The most useful complaints separate facts, issues, evidence and remedies so the organisation can answer each point. The aim is to create a record that still makes sense if it later reaches an ombudsman, regulator or court.
Start by defining the complaint scope. If you have five issues, number them. For each issue say what happened, why you say it was wrong, what evidence proves it and what outcome you want.
Key points
- Use a clear subject line and state that it is a formal complaint.
- Put the chronology in date order and the allegations in issue order - they serve different purposes.
- Quote decisive documents accurately and identify them by date.
- Ask for specific remedies rather than “compensation” in the abstract.
A useful complaint structure
- Opening: what you are complaining about
- Issues: numbered and separately defined
- Key chronology: only dates needed to understand the sequence
- Evidence: document or record supporting each issue
- Impact: financial loss, practical inconvenience or other harm
- Remedy: what should be corrected, refunded, done or paid
- Questions: specific matters requiring an answer
Facts first, conclusions second
Write “On 14 March the provider confirmed X” before “therefore the later statement is inconsistent”. That lets the reader verify your conclusion. Avoid presenting assumptions as facts.
Write for the next reader
Even if you expect the company to resolve the matter, write so an independent reviewer could understand it without a phone call from you. This means naming documents, avoiding unexplained acronyms and keeping the complaint scope stable.
In practice
- Use headings and numbered issues rather than one continuous narrative.
- Attach the most important evidence and offer the rest in an index rather than dumping hundreds of pages.
- Ask the organisation to answer each numbered issue in its final response.
What to do
A practical next-step plan
- Define the complaint issues in one sentence each.
- Build a short chronology.
- Match each issue to supporting evidence.
- State the rule/contract/process only where it genuinely applies.
- Describe impact separately from the underlying breach.
- Set out the remedy sought for each issue.
- Ask for a reasoned written final response.
Common traps
Things that often confuse the issue
- Do not bury the main issue under every bad customer-service interaction.
- Do not cite laws you have not connected to the facts.
- Do not ask twenty rhetorical questions where five precise questions would do.
- Do not accept an apology as resolution if correction or financial redress is still required.
Evidence worth keeping
End with a decision checklist.
Useful closing.
“Please answer each numbered issue, identify the evidence relied upon, state what you uphold or reject with reasons, set out the remedy and implementation date, and provide the correct external escalation route if this is your final response.”
That gives the next decision-maker a cleaner record if the complaint is not resolved.
Anticipate the likely answer.
| Likely response | Prepare now |
|---|---|
| “It is our policy.” | Ask whether policy changes statutory/contractual rights and obtain the policy version. |
| “The system shows…” | Ask for underlying evidence and chronology. |
| “No evidence.” | Identify primary records and any evidence uniquely held by the organisation. |
| “Out of time.” | Calculate event, knowledge, complaint and referral dates. |
| “Goodwill only.” | Separate correction/refund from discretionary compensation. |
Use law and rules as applied propositions.
Do not paste legislation at the organisation. State the relevant requirement and connect it to the fact: “The contract required X; your bill did Y” or “the scheme requires a reasoned response; issue 3 was not addressed”. Applied law is persuasive; decorative citations are not.
The strongest complaint can usually be summarised in four lines.
What happened; why it was wrong; what evidence proves it; what you want done. If that core cannot be identified, more structure is needed before adding law or correspondence.
Official sources
Check the rules behind this guide
These are official or primary sources for this topic. Rules, scheme terms and deadlines can change, so check the live source before relying on a formal time limit or procedure.