Financial Ombudsman Complaint Letter Generator

Free interactive generator for UK Financial Ombudsman Service complaints. Produces a structured FOS letter citing the relevant DISP rules + the specific scheme (PSR Mandatory Reimbursement / chargeback / Section 75 / CIFAS marker / account closure / bank delay). Runs entirely in your browser; nothing you enter is uploaded. Includes evidence-pack inventory + filing instructions.

Last reviewed: 14 May 2026 · ScamSupport research

When to use this tool: after the bank has issued a final response letter you’re not happy with, OR after 8 weeks of no resolution. FOS is free for consumers, binding on the firm, and in 2024 upheld around 78% of APP fraud complaints in the consumer’s favour. For the firm-side claim itself (before escalation), use the PSR Claim Wizard (bank transfers) or Chargeback & Section 75 Generator (cards).

What FOS actually does

The Financial Ombudsman Service is the UK’s statutory dispute-resolution body for complaints against FCA-regulated financial firms. It operates under FCA DISP rules (in the FCA Handbook). It’s free for consumers, binding on the firm, and applies a “fair and reasonable” test under DISP 3.6 — this is broader than strict legal interpretation, which is why FOS frequently rules in consumers’ favour even when the firm has technically followed the letter of the law.

FOS can order monetary awards up to £430,000 per complaint for acts or omissions since 1 April 2024 (lower caps apply to older acts). It can also order: removal of wrongful CIFAS markers, account reinstatement, refunds of fees, distress and inconvenience compensation, and 8% interest on delayed funds.

When can you file with FOS?

  • After the firm issues a final response letter rejecting your complaint — within 6 months of the date of the letter.
  • After 8 weeks of no resolution following your formal complaint to the firm — even if no final response has been issued.
  • Generally within 6 years from the act / omission, or 3 years from when you reasonably became aware — whichever is later. Filing the firm-complaint within this window is what starts the FOS clock.

The DISP rules that matter

The Dispute Resolution: Complaints chapter (DISP) of the FCA Handbook is the source of FOS authority. The sections most relevant to scam-related complaints:

  • DISP 2 (Jurisdiction) — defines which firms FOS covers, who is an eligible complainant, and the time limits for filing.
  • DISP 3.5 / DISP 3.6 (Consideration and fair-and-reasonable test) — the standard FOS applies when reviewing complaints. The fair-and-reasonable test is broader than strict legal interpretation.
  • DISP 3.7 (Awards) — what FOS can order, including monetary awards, interest, distress and inconvenience compensation, and direction to the firm to take specific action.
  • FCA Principles for Businesses (PRIN), especially PRIN 12 (Consumer Duty) — in force since July 2023. Requires firms to act to deliver good outcomes for retail customers; FOS has cited Consumer Duty extensively in 2024-2025 fraud-related decisions.
  • Banking: Conduct of Business Sourcebook (BCOBS) — sets standards for banks in relation to customer treatment.

Typical timeline

  • Case-handler allocation: 4-8 weeks from filing.
  • Case-handler assessment: 3-6 months. Both parties get to respond to an initial view.
  • If escalated to ombudsman final decision (because either party rejected the assessment): a further 3-9 months.
  • End-to-end typical: 6-12 months. Complex cases 18-24 months. FOS prioritises hardship cases — flag any vulnerability in your filing if relevant.

What FOS can award

  • Refund of the loss, up to £430,000.
  • 8% simple interest from the date the firm should have refunded.
  • Distress and inconvenience compensation — typically £100-£1,500 in scam-related cases; higher awards in cases of particularly poor firm conduct.
  • Removal of wrongful CIFAS markers or fraud flags.
  • Account reinstatement where firm closed wrongfully.
  • Specific firm actions — written apology, amendment of credit-file entries, refund of fees.
  • Recommendations beyond the cap — for losses above £430,000, FOS can recommend (not order) higher amounts. Firms typically comply to preserve relationship with FOS.

What this tool does NOT do

  • File the FOS complaint on your behalf — you submit the generated letter via FOS’s online form or by phone / post.
  • Replace the firm-side claim — FOS is escalation. The firm-complaint comes first. Use the PSR Claim Wizard or Chargeback & Section 75 Generator for that.
  • Cover non-FCA-regulated firms — FOS jurisdiction is limited to FCA-regulated entities. For pure unregulated firms (most crypto-exchange-only entities), check coverage at the FOS website.
  • Replace civil action where the FOS award cap is insufficient. For losses substantially above £430,000, consider engaging an SRA-regulated solicitor in parallel.

Frequently asked questions

Does FOS only handle bank complaints?

No. FOS covers all FCA-regulated firms — banks, building societies, credit-card issuers, payment service providers, insurance companies, financial advisers, investment platforms, pension providers, fintechs. If the firm has FCA permission, FOS has jurisdiction.

Can I withdraw my complaint?

Yes, at any time. You retain the right to reject the ombudsman’s final decision and pursue civil action. The firm cannot reject the decision once accepted by you.

What if my complaint is rejected by FOS?

You retain civil-court rights. The FOS decision is admissible evidence but not binding on a court. For complex / substantial cases, consider SRA-regulated specialist solicitors.

Is the firm punished if I win?

The firm pays a case fee (per case, not per claim amount). Repeat poor performance attracts regulatory attention from the FCA. Beyond that, FOS rulings inform FCA supervisory action against firms with systemic complaint patterns.

How do I prove "distress and inconvenience"?

Describe specific impacts in chronological order: time off work to manage the complaint, family stress / relationship impact, mental-health symptoms (be honest, GP records help), missed sleep / appetite, knock-on financial impact (missed mortgage payment due to frozen account, etc.). FOS awards reflect documented impact.

Related ScamSupport tools and pages

Sources

This generator is provided for guidance only and is not legal advice. DISP rules and FOS case law are nuanced; complex cases may warrant professional advice. Where the loss is substantial (e.g. above £100,000) or where the firm-side conduct is particularly egregious, consider engaging an SRA-regulated solicitor in parallel.