Title Insurance: insurance that protects the lender against any claims that arise from arguments about ownership of the property; also available for homebuyers. An insurance policy guaranteeing the accuracy of a title search protecting against errors. Most lenders require the buyer to purchase title insurance protecting the lender against loss in the event of a title defect. This charge is included in the closing costs. A policy that protects the buyer from title defects is known as an owner’s policy and requires an additional charge.