In a suit filed under the Employee Retirement Income Security Act (ERISA), the Tenth Circuit recently affirmed a district court's reliance on the relatively obscure "effective vindication exception," first announced a decade ago by the U.S. Supreme Court, as the basis to refuse to enforce an arbitration provision in a defined contribution retirement plan. Harrison v. Envision Mgmt. Holding, Inc., — F.4th —, 2023 U.S. App. LEXIS 3144 (10th Cir. Feb. 9, 2023).