Undervaluation is when the customer chooses an inadequate valuation level of full value replacement coverage that doesn’t include the total replacement costs of the items of extraordinary value and the main shipment items. Arpin of RI suggests that customers prepare a listing or a spreadsheet for the contents of each room of their home with the approximate replacement costs for the listed items. Once the totals for the rooms are tallied, combine them and round up to the next $50,000 increment.