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29 July 2026

How to File a Broker Complaint: The Process Explained

How to File a Broker Complaint: The Process Explained

What Counts as a Broker Complaint

If you have a problem with your brokerage firm, understanding how the formal complaint process works is essential. FINRA treats customer dissatisfaction as a complaint only if it is in writing (including emails, text messages, and direct messages). A phone call expressing frustration, while important to address, won't trigger the formal complaint procedures that protect you. Your complaint must be written—whether that's an email, a letter, or even a social media post.

How to File Your Complaint

When you decide to file a written complaint, if you lost money or there was an unauthorized trade made in your account, you should complain in writing and retain copies of your letter and of all other related correspondence with the brokerage firm. Start by documenting the issue clearly, including dates, transaction details, and what resolution you're seeking. Immediately question your broker about any transaction that you do not understand or did not authorize with your broker, and if you are not satisfied with your broker's response, contact the firm's branch manager or compliance department.

Your broker must acknowledge receipt of the complaint promptly. Member firms must acknowledge receipt of the complaint within 15 business days of receiving it and respond to the issues raised in the complaint within a reasonable period of time.

Understanding Dispute Resolution

If the firm's handling doesn't satisfy you, you have options beyond accepting their response. Most, if not all, account agreements between broker-dealers and their customers have arbitration clauses that usually require customers to arbitrate any disputes with the broker-dealer. FINRA's Dispute Resolution Services helps investors and firms resolve securities-related disputes through arbitration and mediation, providing a fair, efficient and effective forum for resolving disputes involving brokerage firms and their brokers.

Arbitration may be cheaper and quicker than litigating a dispute in court. Generally, the rules governing arbitration allow a claim to be filed within six years of the occurrence or event giving rise to the cause of action. However, time restrictions called statutes of limitations may be shorter, so acting promptly is crucial.

Taking Action

Member firms must keep a separate file of all customer complaints for at least four years, with files maintained at the firm's Office of Supervisory Jurisdiction. Your complaint becomes a formal record, and FINRA investigates complaints against brokerage firms and their employees and is empowered to take disciplinary actions against brokers and their firms.

The key to a successful complaint is specificity, documentation, and persistence. Keep records, communicate in writing when possible, and don't wait—the sooner you address an issue, the better your options for resolution.

Sources

FINRA Rule 4530 Reporting Requirements

FINRA Dispute Resolution Services

SEC Investor Bulletin: Broker-Dealer/Customer Arbitration

Analysis, not investment advice.

General education, not investment advice. Not a recommendation to buy, sell, or hold any security or use any specific broker.
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