Regulation & safety

Broker complaint

Also calledformal complaint

A broker complaint is a formal statement to a brokerage firm alleging a problem with its service, conduct, account administration, disclosures, execution, charges, or handling of client money, and requesting a specified remedy.

Evidence passport

What this page checked.

Sources
2
Record updated
August 18, 2026

Broker complaint — definition, practical meaning, example, and common interpretation risk checked against the linked reference material

Definition checked

  • Definition and plain-English explanation for “Broker complaint”
  • The worked example and the distinction described in the watch-out note
  • Reference material: Financial Ombudsman Service — How to complain, FCA — Complaints information

Use the term correctly

  • Read the connected terms when a definition depends on another market concept
  • Check the broker’s contract specification when applying the term to a particular product
  • Treat examples as explanations of mechanics, not as prices, forecasts, or trading advice

Method. Editorial desk review of the definition, example, related concepts, and 2 linked sources. Calculations are checked directly where the entry contains arithmetic

Research scope and limits +
  • This glossary entry explains terminology and does not test a broker, trading account, platform, or live market condition
  • Contract wording and practical treatment can differ across brokers, venues, jurisdictions, and products
Page change log +
  1. Added named authorship, a definition evidence record, application checks, and a concise scope disclosure

What Broker complaint means

A useful complaint identifies the account, dates, instruments or transactions involved, what happened, why it was wrong, the evidence available, and the requested outcome. It should be sent through the firm’s stated complaints channel rather than only through informal live chat. Keep the broker’s acknowledgment and final response.

A clear written record helps the broker investigate and may be required before an external ombudsman or regulator can consider the matter. Complaining promptly can matter because internal and external complaint procedures often have deadlines. A complaint process is not a substitute for managing open-position risk while the issue is investigated.

A trader sees that a $25 inactivity fee was charged despite meeting the account’s stated activity condition. She submits a complaint with the fee notice, trade history, the relevant terms, and a request for reversal. The broker can then investigate the contractual and account-record evidence rather than a vague allegation.

Common questions

What evidence should a broker complaint include?+

Include the account identifier, dates and times, order or transaction references, screenshots where available, statements, relevant terms, communications, and a concise explanation of the remedy sought. Preserve original records rather than editing them.

Can I complain about trade execution?+

Yes, if you believe execution breached the broker’s terms or applicable obligations. State the requested order details, displayed and filled prices, timestamps, market conditions, and why you believe the execution was improper.

Go to the original material.

01Financial Ombudsman Service — How to complain02FCA — Complaints information