Formal Complaint Letter Builder

Draft a professional complaint to a company, landlord, or authority

Build a structured, professional complaint letter with your incident description, dates, evidence summary, the remedy you want, and a clear escalation intent if the matter stays unresolved. Free, private, runs in your browser.

How long should I give them to respond?

A common standard is 8 to 14 calendar days for a written response, though many regulated sectors (such as UK financial services) allow up to 8 weeks for a final answer. Pick a deadline that is firm but reasonable so it cannot be dismissed as unrealistic.

Get your complaint taken seriously the first time

A complaint only works when it is specific, calm, and easy to act on. Vague, angry letters get filed under “difficult customer”; a structured one with names, dates, a clear remedy, and a deadline gets routed to someone who can actually fix it. This builder assembles those elements into a professional letter you can copy straight into an email or print on letterhead.

How it works

The tool follows the structure that complaints teams and ombudsmen expect, in order:

  1. Header and reference — your details, the recipient, the date, and any account or order number so the letter is matched to your file instantly.
  2. Statement of complaint — one line naming this as a formal complaint, which often triggers a company’s formal complaints procedure and its response-time obligations.
  3. What happened — a factual, dated account of the incident with no editorialising.
  4. Impact — the concrete effect on you (money lost, time, inconvenience), which justifies the remedy.
  5. Evidence — a short list of the documents you are attaching.
  6. Remedy requested — the specific outcome you want and by when.
  7. Escalation intent — what you will do if it is unresolved.

Nothing is sent anywhere — the letter is generated entirely in your browser from the fields you type.

Tips and example

  • Keep the tone factual. “On 3 May the boiler stopped working and remained off for 9 days despite three calls” lands harder than “your service is appalling.”
  • Quantify the impact where you can: a refund request is stronger when the amount is stated.
  • Name a single, reachable deadline. “Please respond within 14 days of this letter” is enforceable in spirit; “respond soon” is not.
  • Keep a copy of everything and note the date you sent it. If you escalate later, that paper trail is your case.