• The Defense Expenses Supplements are intended for use in Commercial General Liability (CGL) policies. These non-standard confirmations state that if the insurer agrees to provide protection to the insured, but it is later determined that the claim will not be covered by the policy (and thus there is no obligation to protect), the insurer is entitled to reimbursement of the costs of protection incurred up to that point. The endorsement is intended to comply with court rulings in some states that the insurer’s right to reimbursement must be preserved in the language of the insurance policy. Some of the acknowledgments require the insurer to give written notice that coverage may not apply (reservation letter) and the insurer’s intention to seek reimbursement of defense costs if the claim is determined not to be covered.