Missouri Court of Appeals, Western District / May 31, 2022
Judy A. Tinnin vs. MODOT & Patrol Employees' Retirement System
Judy A. Tinnin sought judicial review of a decision by the MODOT & Patrol Employees' Retirement System (MPERS) board of trustees, which corrected a calculation error that reduced her future monthly retirement benefits. The trial court reversed MPERS's decision, applying equitable estoppel and interpreting the relevant statutes to include a reasonableness limitation on MPERS's duty to correct errors. The appellate court reversed the trial court's judgment, holding that MPERS had a mandatory statutory duty to correct calculation errors discovered within ten years, and this duty was not subject to a reasonableness limitation or equitable estoppel.