A Tale of Two Creditors: The Surety’s Equitable Right vs. The Bank’s Perfected Interest

The Minnesota Supreme Court recently issued a decision in United Prairie Bank v. Molnau Trucking, LLC, No. A23-1478, 2025 WL 1943964 (Minn. July 16, 2025) (slip op.), resolving a long-standing question of priority between a construction surety’s equitable right of subrogation and a bank’s perfected security interest under the Uniform Commercial Code (“UCC”). As a matter of first impression in Minnesota, this is a critical clarification of Minnesota law. It reinforces the unique and powerful nature of equitable subrogation for performing sureties and sets a clear precedent that their interests take priority even over those of secured creditors.

The Underlying Dispute: A Battle Over Contract Funds

This case arose from a common scenario in the construction industry. Between April and September 2020, United Prairie Bank (“UPB”) issued three loans to Molnau Trucking LLC (“Molnau”), a contractor, totaling over $3 million. Immediately after issuing each loan, UPB perfected its security interests, including, among other things, Molnau’s present and future accounts receivable.

In the spring of 2021, Molnau entered into several contracts to perform public works projects. To enter into these contracts, Molnau was statutorily required to provide payment and performance bonds. Granite Re, Inc. (“Granite”) issued the bonds on Molnau’s behalf, guaranteeing Molnau’s obligations to the governmental entities and subcontractors.

Molnau failed to pay laborers and suppliers on the projects and defaulted on its loan obligations with UPB. Granite, as the performing surety, stepped in to pay the subcontractors to fulfill its bond obligations. Granite then sought to recover its payments from the remaining contract funds that were due to Molnau. However, UPB asserted its perfected security interest in those same funds, arguing that it had priority under the UCC’s “first-in-time” rule.

The district court and court of appeals sided with the Bank, applying a “mistake of fact” standard from equitable subrogation in the mortgage context. See Carl H. Peterson Co. v. Zero Ests., 261 N.W.2d 346, 348 (Minn. 1977). They reasoned that because UPB had filed its UCC statements prior to the issuance of the bonds, Granite was on notice of the Bank’s security interest and therefore its decision to pay on the bonds was not an “excusable mistake.” Therefore, they determined UPB’s security interest took priority.

Matter of First Impression: Reconciling Equity and the UCC

The Minnesota Supreme Court granted review to address a fundamental question that had not yet been squarely decided by Minnesota precedent: Does a performing surety’s equitable right of subrogation take priority over a secured creditor’s earlier perfected security interest? The court answered this question in favor of the surety, holding that (1) the “mistake of fact” standard does not apply in the context of a performing construction surety and (2) a performing surety’s equitable right to subrogation is not subject to the “first-in-time” rule.

The court’s reasoning was grounded in the familiar principle that a surety, by paying a principal’s debt, “steps into the shoes” of the party whose debt it has paid—the suppliers and laborers in this case. By paying these debts, Granite effectively fulfilled Molnau’s obligations to them. Had it not done so, there would have been no funds to dispute. Therefore, Granite acquired a superior interest in the bonded contracts than the later-perfected security interest.

The Implications of the Opinion to the Construction Context and Beyond

The United Prairie Bank decision has significant implications on parties involved in construction financing and potential disputes after a bonded party defaults.

For construction sureties, the United Prairie Bank opinion provides a powerful shield. It clarifies that their equitable subrogation rights are not subject to the same “mistake of fact” analysis applied in other contexts. In other words, the opinion gives sureties confidence in their ability to recover funds after fulfilling their bond obligations.

For banks and other secured creditors in construction lending, the opinion provides a cautionary tale. Although a lender may have a perfected security interest in a party’s accounts receivable, those interests are now definitively subordinate to a surety’s equitable subrogation rights in bonded contract funds. Lenders must now account for this priority when financing projects that involve performance and payment bonds.

While United Prairie Bank provides certainty in the construction context, the doctrine of equitable subrogation has been applied in a wide variety of contexts beyond construction sureties, including cases involving insurance, mortgage, and taxes. The doctrine of equitable subrogation is not applied uniformly across these contexts. Accordingly, parties engaged in payment disputes and competing claims to payment involving equitable claims and secured claims should consult experienced litigation counsel who can assist them with navigating this complex landscape.

Cody Nickel is a litigation attorney at Anthony Ostlund Louwagie Dressen & Boylan P.A. Cody is a trusted advisor and zealous advocate who utilizes the experience gained from his broad background to plan and execute creative and strategic legal solutions and courses of action for his clients. From the very first conversation, through trial and appeals, Cody takes on his client’s issues with the same drive and urgency as though they were his own. Cody represents clients in shareholder disputes, breach of contract cases, employment matters, construction disputes, and a range of other complex commercial matters.