If your bank, insurer, lender or payment provider has handled a problem poorly, a structured complaint can be more effective than repeated calls. This guide explains how to make a formal financial complaint, what to record, when to expect a final response, how to refer the matter to the Financial Ombudsman Service, and how to assess a proposed remedy without losing track of important dates.
Overview
A financial complaint normally has three stages: complain to the business, allow its internal complaints process to run, and escalate to the Financial Ombudsman Service (FOS) if the response is unsatisfactory or the business does not resolve the matter.
You do not usually need to use legal language. The important points are to identify what happened, explain why you believe the service or decision was unfair, provide relevant evidence, and state the outcome you want. A complaint may concern an unauthorised payment, account closure, fraud handling, a declined claim, poor insurance administration, unsuitable service, fees, delays, or a failure to provide information clearly.
Keep the complaint separate from any wider court claim or debt dispute. If you are considering court proceedings, check the contract, relevant pre-action requirements and limitation issues before relying solely on an ombudsman route. Our small claim pre-action checklist explains the different process.
Which route may apply?
| Problem | First step | Possible escalation | Evidence to keep |
|---|---|---|---|
| Bank account, card, lending or payment dispute | Use the bank or provider's formal complaints process | Financial Ombudsman Service, where eligible | Statements, messages, payment records and complaint reference |
| Insurance claim, cancellation or policy administration | Complain to the insurer, broker or claims handler responsible | Financial Ombudsman Service, where eligible | Policy documents, claim decision, photographs, reports and correspondence |
| Unauthorised card or account transaction | Report it promptly and ask the provider to investigate | Internal review and, where appropriate, FOS referral | Transaction details, fraud report, device or travel information and notifications |
| Payment made for goods or services not supplied | Contact the seller and payment provider; consider the payment method's dispute route | FOS for a complaint against the financial business, if eligible | Order confirmation, cancellation evidence, delivery information and payment record |
The correct remedy depends on the facts and the legal or regulatory basis of the complaint. A complaint is not automatically a claim for compensation, and an ombudsman referral is not the same as court proceedings.
What to track
Use one evidence log from the first contact onwards. Record the date, channel, person or team contacted, reference number, summary of what was said, and the next promised action. Save original emails and download statements rather than relying on screenshots alone where possible.
Track the complaint timeline
- Incident date: when the payment, refusal, loss, claim decision or service failure occurred.
- Discovery date: when you first became aware of an unauthorised transaction or other problem.
- First notification: when you reported the issue and how you reported it.
- Formal complaint date: the date the business received a complaint clearly labelled as such.
- Response dates: promised callbacks, requests for information, progress updates and any final response.
- Escalation deadline: any date stated in the final response for referring the matter to the FOS.
Financial businesses commonly have regulatory complaint-handling time limits, but the applicable period can depend on the type of complaint. Some payment-related complaints may follow different rules from other financial complaints. Treat the business's written acknowledgement and final response as important documents, and check the current FOS guidance before allowing a deadline to pass.
Track the remedy you are requesting
Be precise about what would put matters right. You might request a refund, correction of records, reconsideration of a claim, removal or reimbursement of a fee, restoration of an account, interest, compensation for a direct financial loss, or a clear explanation. Separate proven financial loss from inconvenience or distress. Explain how each amount was calculated and attach supporting documents.
Do not exaggerate a loss or include unrelated costs. A credible schedule is easier for the complaint handler to assess and gives the FOS a clear record if the dispute is later referred.
Cadence and checkpoints
Review your tracker after every substantive contact rather than waiting for the end of the process. A short weekly check is useful while the complaint is active; a monthly review is sensible if the business has placed it on hold or is investigating a complex matter.
At the start
- Check the provider's complaints page for the correct address, online form or telephone route.
- Send a concise formal complaint and keep proof of submission.
- Ask for a complaint reference and confirmation of the next stage.
- Continue making any undisputed contractual payments unless you have received appropriate advice not to do so.
While waiting for the response
Reply promptly to reasonable requests for documents, but do not repeatedly restart the complaint with new descriptions. Put important telephone conversations in writing afterwards: “To confirm our call today, you said…” If the provider gives a verbal resolution, request confirmation before treating the matter as closed.
When a final response arrives
A final response should explain the business's position and tell you whether and how you can refer the complaint to the FOS. Read it for the decision, reasons, remedy offered, any conditions attached, and the stated referral time limit. A letter saying the business is still investigating may not be a final response, so ask directly if you are unsure.
Save the final response with its attachments. Put the referral deadline in your calendar with an earlier reminder. If no final response arrives within the applicable period, check the current FOS rules to see whether you can refer the complaint based on the delay.
How to interpret changes
A new offer is not necessarily a complete resolution. Compare it with the remedy originally requested and ask whether it covers the whole complaint or only one part. Check whether accepting it requires you to withdraw the complaint, sign a settlement agreement, or keep the amount confidential. Do not accept wording you do not understand.
If the provider changes its explanation, create a new entry in the evidence log and identify what evidence caused the change. Distinguish between:
- A factual correction: for example, the provider accepts that a payment date or policy detail was recorded incorrectly.
- A changed decision: the business reverses a refusal or agrees to reconsider the case.
- A partial remedy: a fee is refunded but the underlying loss or service failure remains unresolved.
- A goodwill payment: an offer made without necessarily accepting liability.
If the outcome remains unsatisfactory, prepare a short referral summary for the FOS. Include the complaint reference, the final response, a chronology, the key evidence, the remedy sought and why the response does not resolve the problem. Check eligibility and submission instructions on the official Financial Ombudsman Service website because rules, time limits and jurisdiction can change.
For payment problems, also check whether a separate card dispute, chargeback or statutory route may be relevant. These routes can have different requirements and do not always provide the same remedy. Our guide to financial complaints and ombudsman escalation provides a broader process overview.
Financial complaint letter template
Adapt the following wording rather than sending it unchanged:
Subject: Formal complaint about [account, policy or transaction reference]
I am making a formal complaint about [brief description]. The relevant events occurred on [dates]. My concern is that [explain the error, delay, decision or service failure].
The impact on me has been [direct financial loss, inconvenience, distress or other specific impact]. I enclose [list the most relevant documents].
I ask you to [state the remedy: refund or reimburse a specified loss, reconsider the decision, correct records, remove a fee, provide an explanation, or take another practical step]. Please explain how you have calculated any proposed payment and identify whether your response is a final response for complaint purposes.
Please confirm receipt, provide the complaint reference, and tell me when I should expect your written response. I reserve the right to refer the complaint to the Financial Ombudsman Service if it is not resolved.
Yours faithfully,
[Name and contact details]
When to revisit
Revisit this guide whenever you receive a new letter, a final response, a revised settlement offer or a request for more evidence. Set a weekly reminder while waiting for an active response, and a monthly or quarterly review if the dispute is dormant. At each review, check four things: what has changed, what deadline is next, what evidence is missing, and whether the requested remedy still reflects your actual loss.
Before escalating, confirm the provider, product type and current FOS instructions. If the dispute involves a substantial sum, limitation risk, insolvency, fraud allegations or a threatened court claim, consider independent legal advice. For related court preparation, see the small claims evidence bundle checklist. Keeping the timeline current turns a frustrating financial complaint into a manageable sequence of decisions.
