When money goes missing, a co-owner starts a competing venture, or a partner cuts you out of decisions, the question is not just whether it feels wrong. The question is whether your partner breached their fiduciary duty in a way a Florida court will recognize and remedy. Proving that claim takes more than frustration. It takes the right elements, the right evidence, and a clear-eyed view of the remedies available. This guide walks Florida business owners through each step.
What Is a Fiduciary Duty Between Business Partners?
A fiduciary duty is the legal obligation to act in the best interests of the business and your co-owners rather than your own. It is the highest duty the law imposes in a commercial relationship. In a Florida partnership, Florida Statutes section 620.8404 limits a partner’s fiduciary duties to two categories: the duty of loyalty and the duty of care. The duty of loyalty requires a partner to account for any profit or benefit taken from the business, to avoid self-dealing on behalf of an adverse interest, and to refrain from competing with the partnership before it dissolves. The duty of care requires a partner to avoid grossly negligent or reckless conduct, intentional misconduct, and knowing violations of law.
The same framework applies to limited liability companies. Under Florida Statutes section 605.04091, managers of a manager-managed LLC and members of a member-managed LLC owe the company and its members the same duties of loyalty and care, along with the obligation of good faith and fair dealing. Whether your fiduciary sits in a partnership, an LLC, or a corporation shapes the analysis, so understanding your entity type and how it is run matters. If you are unsure, our overview of manager-managed versus member-managed LLCs explains who actually owes duties in your structure.
What Are the Elements of a Breach of Fiduciary Duty Claim in Florida?
To win, you must prove three elements: the existence of a fiduciary duty, a breach of that duty, and damages proximately caused by the breach. The Florida Supreme Court set out this framework in Gracey v. Eaker, and Florida courts apply it in business disputes every day. Each element carries its own proof burden, and a claim fails if any one of them is missing.
Proving the Duty Existed
Start by establishing that your partner owed you a fiduciary duty in the first place. In most co-ownership situations, this is straightforward because the duty arises by statute or from the ownership relationship itself. Your operating agreement, partnership agreement, or shareholder agreement is the first document to pull because it often defines roles, decision-making authority, and duties. Our guide to the six key considerations in an LLC operating agreement shows how these documents allocate authority, and our piece on drafting an effective operating agreement explains how well-drafted terms make the duty easier to prove later.
Proving the Breach
Next, show the specific conduct that violated the duty. This is where most cases are won or lost. Common breaches include diverting company funds, taking a corporate opportunity for personal gain, self-dealing through undisclosed side deals, competing with the business, misusing confidential information, or freezing a co-owner out of profits and information. Vague accusations will not carry the day. You need to tie the conduct to a specific duty and a specific act. Many of these disputes overlap with broader ownership conflicts, which we address in five tips for navigating corporate disputes and in our discussion of member disputes in an LLC.
Proving Causation and Damages
Finally, connect the breach to actual harm. Florida requires that the breach be the proximate cause of your damages, so you must show the loss would not have occurred but for the misconduct. Damages can include lost profits, the value of a diverted opportunity, misappropriated funds, or diminished business value. In appropriate cases, egregious misconduct can support a claim for punitive damages, a topic we cover in our overview of punitive damage claims in business litigation.
What Evidence Do You Need to Prove Your Partner Breached Their Fiduciary Duty?
The strongest cases are built on documents, not memories. Because fiduciaries usually control the records, gathering proof early and preserving it is critical. Focus your evidence-gathering on a few core categories.
Financial Records and the Money Trail
Bank statements, general ledgers, tax returns, expense reports, and vendor invoices often reveal self-dealing and diversion of funds. Look for unexplained transfers, payments to entities your partner controls, inflated salaries, or expenses that do not match the business. A forensic accountant can trace funds and quantify losses in a way that stands up in court.
Communications and Corporate Documents
Emails, text messages, and internal memos frequently show intent and knowledge, which matter for the duty of care and for punitive damages. Corporate records, meeting minutes, and resolutions show what was authorized and what was not. Your governing documents anchor the whole analysis, which is why a healthy corporate governance practice pays off long before a dispute begins.
Formal Discovery and Information Rights
If your partner controls the books, you are not without options. Owners generally have statutory and contractual rights to inspect company records, and litigation opens the door to formal discovery, subpoenas, depositions, and document requests. These tools let you compel production of the very records a disloyal fiduciary would rather hide. Where a company’s assets are at risk during the fight, a court can appoint a neutral to preserve them, as explained in our overview of receiverships.
What Are Common Defenses to a Breach of Fiduciary Duty Claim?
Expect your partner to push back, so anticipate the defenses before you file. Understanding them helps you build a claim that holds up.
The business judgment rule is the most common defense. It protects good-faith decisions made with reasonable care, even decisions that turn out badly, so courts will not second-guess honest judgment calls. To overcome it, you generally must show bad faith, self-interest, or a failure to inform. Another frequent defense is the economic loss rule and the independent tort doctrine, which can bar a tort claim that merely duplicates a contract claim. We break this down in our analysis of the independent tort doctrine after Tiara Condominium. A partner may also argue consent, ratification, or that the conduct was expressly permitted by the operating agreement, which is another reason those documents matter so much.
How Long Do You Have to Sue in Florida?
Do not wait. In Florida, the statute of limitations for a breach of fiduciary duty is generally four years under Florida Statutes section 95.11. The clock usually starts when the breach was, or reasonably could have been, discovered. Related claims can carry shorter windows. Breach of trust claims, for example, can face far shorter deadlines, as we explain in our overview of a trust beneficiary’s remedies for breach of trust. Because delay can cost you the claim entirely, and because discovery-rule arguments are fact-specific, it is best to consult counsel as soon as you suspect misconduct.
What Remedies Are Available If You Prove the Breach?
Florida courts can award both money and equitable relief. Money damages aim to make the business or the aggrieved owner whole, and they can include lost profits, disgorgement of ill-gotten gains, and the return of misappropriated assets. In appropriate cases, courts can also order equitable remedies such as an accounting, the imposition of a constructive trust, injunctive relief to stop ongoing misconduct, or removal of the offending fiduciary.
The claim can also be paired with related causes of action. When a partner misuses confidential information, a trade secret claim may follow. When harm falls on the company rather than an individual owner, the case may proceed as shareholder or derivative litigation, and choosing the right vehicle matters, as our discussion of who counsel can represent in derivative litigation explains. In some disputes, the goal is separation rather than damages, which can lead to buyout, dissolution, or member or shareholder expulsion. Our corporate formation, transactions, and dissolution team helps owners unwind these relationships cleanly.
How Jimerson Birr Can Help
Proving that a partner breached their fiduciary duty is a document-intensive, deadline-driven undertaking, and the earlier you move, the stronger your position. Our business litigation attorneys represent business owners across Florida in fiduciary duty disputes, from the first records request through trial and collection. If you believe a co-owner has put personal gain ahead of the company, contact Jimerson Birr to discuss your options and protect what you have built. To learn more about how we handle these matters, visit our business litigation practice page.
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