In Naperville Hotel Partners, LLC v. Liberty Mut. Fire Ins. Co., 2023 IL App (3d) 220440-U the Illinois Third District Court of Appeals addressed whether failure to include reference to a limitations provision in reservation of rights correspondence to an insured can be deemed a waiver of the provision or otherwise estop the insurer from relying on the provision.

The claim involved water damage sustained at the Insured’s motel as a result of numerous rain events that occurred between 2015 and 2020. Liberty Mutual issued an insurance policy that covered several buildings including the subject hotel. The policy required that any legal action based on the coverage had to be brought "within two (2) years after the date on which the physical damage occurred, extended by the number of days between the date you submitted the statement of loss to us and the date we deny the claim in whole or in part."

Plaintiffs filed their claim with Liberty Mutual in May 2019. In June of 2019 Liberty Mutual sent a reservation of rights letter to the Insured which requested more information and listed the "immediate written notice of loss" provision as a potential basis for excluding coverage but did not list the two-year time-limitation on legal action. Liberty Mutual also did not mention the provision in subsequent communications with the Insured.