Cross liability coverage covers liability when one insured sues another insured on the same policy.
ISO policies include this coverage under the Separation of Insureds clause but coverage can be deleted by an insured versus insured clause or a cross liability endorsement. Endorsements with the name cross liability endorsement have been used to both add and delete this type of coverage. It is therefore important to look and the endorsement to see what it does if it appears on the policy.