Judge Allows Experts, Certifies Class On Whether UM/UIM Coverage Properly Applied

( February 19, 2026, 9:21 AM EST) -- PHOENIX — An Arizona federal judge agreed to certify a class action alleging that an insurer underpaid insureds by failing to stack uninsured motorist (UM) or underinsured motorist (UIM) coverage for policyholders who had multivehicle policies and rejected efforts by the insurer to exclude expert testimony on class certification....