A company officer signs a lease, a vendor agreement, or a purchase order. Nobody checked with the board first. Months later, the board discovers the commitment and wants out. Is the contract enforceable?
In most cases, the answer is yes—and the corporation is bound. Minnesota law, agency principles, and decades of case law all work together to protect third parties who deal with corporate officers in good faith.
As a business attorney who regularly advises Minnesota companies on corporate governance, I see this situation more often than you might expect. Here is how the law actually works, what your exposure looks like, and what you can do about it.
How Minnesota Law Allocates Corporate Authority
The Minnesota Business Corporation Act (MBCA), codified in Chapter 302A, establishes the framework for who can act on behalf of a corporation.
Board-level authority. Under Minn. Stat. § 302A.201, the business and affairs of a corporation "shall be managed by or under the direction of a board." The board holds the broadest grant of authority, and it can delegate that authority to officers, committees, or employees.
Required officers. Minn. Stat. § 302A.301 requires every corporation to have persons exercising the functions of chief executive officer and chief financial officer. These officers carry out the board's directives—and in practice, they regularly enter contracts on the corporation's behalf without obtaining a board vote for each transaction.
Officer duties and delegation. Minn. Stat. § 302A.305 spells out the duties of required officers, including disbursing corporate funds and managing day-to-day operations. Section 302A.351 addresses delegation of officer duties and holds the delegating officer to the standard of conduct in § 302A.361—meaning an officer who delegates signing authority remains responsible for supervising the person who receives it.
General corporate powers. Minn. Stat. § 302A.161 grants corporations broad powers, including the power to "purchase, lease, or otherwise acquire" property, to "sell, convey, mortgage" assets, and to enter contracts of all kinds. These powers exist unless the articles of incorporation say otherwise.
The practical takeaway: Minnesota law does not require board approval for every contract. The board manages the corporation's affairs at a policy level and delegates operational authority to officers. The question is whether a specific officer had—or appeared to have—the authority to sign a particular agreement.
Apparent Authority: Why Third Parties Are Protected
Even if an officer lacked actual authority to sign a contract, the corporation may still be bound under the doctrine of apparent authority.
Apparent authority exists when a corporation's conduct reasonably causes a third party to believe that an officer or agent has authority to act on the corporation's behalf. The Minnesota Supreme Court has long recognized this doctrine. In Duluth Herald & News Tribune v. Plymouth Optical Co., 286 Minn. 495, 176 N.W.2d 552 (Minn. 1970), the court held that apparent authority exists "as to those third persons who learn of the manifestation of the agency relationship from words or conduct . . . for which the principal is responsible."
The critical factors are:
- The corporation's own conduct. Apparent authority flows from the principal (the corporation), not from the agent. If the company held someone out as having signing authority—through titles, business cards, prior transactions, or simple acquiescence—it created apparent authority.
- The third party's reasonable belief. The person on the other side of the contract must have reasonably believed the officer could bind the company. A vendor who deals with the company's VP of Operations on a routine supply agreement has a strong basis for that belief.
- Ordinary course of business. A corporate president's inherent authority extends to acts within the ordinary course of business. It does not extend to extraordinary or unusual transactions. A CEO signing a standard vendor contract is ordinary. A mid-level manager committing the company to a ten-year exclusive distribution deal is likely not.
In Truck Crane Service Co. v. Barr-Nelson, Inc., 329 N.W.2d 824 (Minn. 1983), the Minnesota Supreme Court examined the limits of apparent authority. The corporation's president had sent a written letter disclaiming liability for contracts signed by a particular employee. The court held that this letter was sufficient to put the third party on inquiry—not just about that employee, but about the authority of other employees as well. The lesson: apparent authority can be destroyed, but only through affirmative steps by the corporation.
Ratification: Blessing the Deal After the Fact
When an officer signs a contract without authority, the board can ratify it. Ratification occurs when the corporation, with full knowledge of the material facts, accepts the benefits of the unauthorized transaction or otherwise manifests an intent to treat the contract as valid.
Common forms of ratification include:
- Accepting performance. If the company receives goods or services under the unauthorized contract and does not object, a court is likely to find ratification.
- Making payments. Paying invoices under a contract is strong evidence that the corporation has adopted it.
- Board resolution. The board can formally vote to ratify the contract. This is the cleanest approach and eliminates ambiguity.
Minnesota recently strengthened its ratification framework. Effective August 1, 2025, new Minn. Stat. § 302A.166 allows corporations to formally ratify "defective corporate acts"—including contracts, stock issuances, and elections that were not properly authorized. Once ratified under this section, the act is "no longer deemed void or voidable" and takes retroactive effect from the date of the original act. The board adopts a ratification resolution, files a Certificate of Ratification with the Secretary of State (if required), and provides notice to shareholders. If the underlying act would have required shareholder approval, the ratification must also be submitted to shareholders.
This is a significant development. Before this statute, corporations had to rely on common-law ratification principles or seek judicial validation. Now there is a clear statutory path.
Estoppel: When the Corporation Cannot Walk It Back
Even without apparent authority or formal ratification, a corporation may be estopped from denying that a contract is valid. Estoppel applies when:
- The corporation's conduct led the third party to believe the contract was authorized.
- The third party reasonably relied on that belief.
- The third party would suffer harm if the corporation were allowed to repudiate the agreement.
If a company allowed its officer to negotiate and sign a contract, accepted the benefits, and waited months before raising an authority objection, a court is unlikely to let the corporation escape the deal. The doctrine prevents corporations from enjoying the upside of an agreement while avoiding the obligations.
What About Ultra Vires?
The ultra vires doctrine—Latin for "beyond the powers"—historically allowed a corporation to void contracts that exceeded the scope of its corporate charter. In practice, this doctrine has been largely eliminated in Minnesota.
Under Minn. Stat. § 302A.161, a Minnesota corporation has broad powers to conduct essentially any lawful business. Unless the articles of incorporation specifically restrict the corporation's powers, there is very little a corporation cannot do. The Revised Model Business Corporation Act, on which Minnesota's statute is based, states that "the validity of corporate action may not be challenged on the ground that the corporation lacks or lacked power to act."
Ultra vires challenges still arise occasionally in the nonprofit context, but for a Minnesota business corporation, this argument is rarely viable.
What to Do If You Discover an Unauthorized Contract
If you learn that an officer or employee signed a contract without proper authorization, here is a practical framework:
Step 1: Assess the contract. Read the agreement carefully. What are the obligations, the term, the financial exposure? Is this a contract the company would want to keep?
Step 2: Determine whether the company has already ratified it. Has the company accepted deliveries, made payments, or otherwise performed under the contract? If so, ratification may have already occurred as a matter of law—regardless of whether the board formally approved it.
Step 3: Decide whether to ratify or repudiate. If the contract is beneficial, the board should pass a resolution formally ratifying it under Minn. Stat. § 302A.166. If the contract is harmful, the company may attempt to repudiate—but only if it has not already ratified through conduct, and only if the third party did not reasonably rely on apparent authority.
Step 4: Communicate promptly. If the company intends to repudiate, it must notify the other party immediately. Delay weakens the corporation's position. Recall the Truck Crane Service case: the corporation's written disclaimer was effective precisely because it was prompt and unambiguous.
Step 5: Fix the process. An unauthorized contract is a governance failure. Address the root cause so it does not happen again.
Setting Up Proper Authorization Protocols
Prevention is far less expensive than litigation. Every Minnesota corporation should have clear internal controls governing who can sign what:
Board resolution on signing authority. The board should adopt a resolution specifying which officers and employees have authority to bind the corporation, and setting dollar thresholds for different levels of approval. For example: the CEO may sign contracts up to $100,000; contracts above that threshold require board approval.
Written delegation. When the CEO delegates signing authority to a department head, that delegation should be in writing. Under Minn. Stat. § 302A.351, the delegating officer remains responsible for supervising the delegate.
Contract review procedures. Establish a process requiring legal review before execution of contracts above a specified value or involving unusual terms—employment agreements with non-compete clauses, real estate leases, intellectual property licenses, indemnification obligations.
Vendor and counterparty communication. If an employee is terminated or reassigned, notify counterparties in writing that the person is no longer authorized to act on the company's behalf. This is exactly what protected Barr-Nelson in the Truck Crane Service case.
Annual board review. At least once a year, the board should review and reaffirm its delegation of authority, updating it to reflect changes in personnel, operations, or risk tolerance.
The Bottom Line
Under Minnesota law, contracts signed without board approval are usually valid. Apparent authority, ratification, and estoppel all work to protect third parties who deal with corporate officers in good faith. The corporation—not the third party—bears the risk of internal governance failures.
For CEOs and business owners, this means that the time to address signing authority is before a contract is signed—not after. Clear delegation policies, written authority limits, and prompt communication when authority changes are the best defenses against unwanted commitments.
If you are dealing with an unauthorized contract—whether you want to enforce one or escape one—the specific facts matter enormously. The interplay between apparent authority, ratification, and the corporation's own conduct will determine the outcome.
Aaron Hall is a Minnesota business attorney who advises companies on corporate governance, contract disputes, and business operations. For more information, visit aaronhall.com.