Can waiver and estoppel defenses overcome written contract terms? Pera v. Glide Transportation Explained

The Utah Court of Appeals addressed when waiver and equitable estoppel defenses can apply against written contract obligations in Pera v. Glide Transportation.

Background and Facts

The Pera and Goates families entered a business purchase agreement involving two promissory notes totaling $500,000. The buyers consistently made late payments over nearly five years—17 of 22 payments on one note and 11 of 15 payments on another note were late. Additionally, buyers unilaterally reduced payment amounts claiming an offset for alleged unpaid taxes by sellers. Despite the notes containing nonwaiver provisions and default interest clauses, sellers continued accepting the late and partial payments while sending emails stating they were not waiving their rights. Sellers eventually sued for breach of contract, seeking to apply the 21% default interest rate.

Key Legal Issues

The central issues were whether buyers could assert waiver and equitable estoppel defenses against sellers’ breach of contract claims despite the existence of written contract terms, and whether buyers proved damages entitling them to an offset for alleged unpaid taxes.

Court’s Analysis and Holding

The district court rejected the waiver and estoppel defenses, concluding the case was “governed entirely by the written documents” and that written terms controlled absent express modification. The Court of Appeals reversed, explaining that both doctrines “presuppose that there is an outstanding contractual obligation” but examine whether subsequent conduct should prevent enforcement of contract rights. The court emphasized that waiver requires proving “intentional relinquishment of a known right” based on the “totality of the circumstances,” while equitable estoppel is “highly fact-sensitive” and requires proof of elements like reasonable reliance and prejudice. Because the trial court made no factual findings on these elements, the case was remanded for proper analysis. However, the court affirmed rejection of the offset claim, finding buyers failed to prove actual damages from the alleged tax problem.

Practice Implications

This decision clarifies that written contracts do not categorically preclude waiver or equitable estoppel defenses. Practitioners should ensure trial courts make specific factual findings on all elements of these doctrines rather than dismissing them based solely on written terms. The case also demonstrates the importance of proving actual damages, not just theoretical harm, when claiming contractual offsets.