11th Cir.

Weissman v. Cheokas

June 18, 2026 ·1:17-cv-00220-WLS ·Unpublished ·Abudu · By Maria Santos

The Eleventh Circuit affirmed a district court ruling enforcing a settlement agreement reached via email during mediation. The court also upheld sanctions against the appellant's counsel for vexatious litigation conduct and denied a late motion to amend the complaint.

Background

Mark Weissman and his company, Weatherly Aviation Company, Inc., engaged in a decades-long dispute with Michael Cheokas over aircraft assets and alleged fraud. After multiple rounds of litigation, the parties participated in a mediation in June two thousand and twenty-three. During the session, counsel exchanged emails agreeing to a settlement involving dismissal of claims and payment of thirty-four thousand two hundred and fifty dollars. Weissman later reversed course, claiming no agreement was reached and seeking to enforce the mediation’s confidentiality provision to exclude the emails. The district court enforced the settlement, denied the confidentiality motion, sanctioned Weissman’s counsel, and denied leave to amend the complaint.

The court’s reasoning

The court held that the Mediation Agreement unambiguously distinguished between confidential communications and written agreements resulting from the mediation. The email exchange memorializing the settlement terms fell within the admissible exception. Under Georgia law, the emails demonstrated mutual assent to the essential terms of the contract. The court found that the district court did not abuse its discretion in imposing sanctions under Section nineteen hundred and twenty-seven because counsel’s repeated refusal to acknowledge the settlement constituted unreasonable and vexatious conduct that multiplied proceedings. Finally, the denial of leave to amend was proper due to undue delay and prejudice to the opposing party.

What it means going forward

The decision clarifies that email exchanges memorializing settlement terms during mediation are enforceable contracts and admissible evidence, even if a formal signed document is not executed. It reinforces that counsel may face sanctions for continuing to litigate after a settlement has been objectively reached and that courts will deny late amendments that prejudice the opposing party.