Travelers can have MEDEX complaints if a claim is denied or if they are not satisfied with the service they have received. When this is the case, and the policy was purchased through Squaremouth, the traveler has an advocate on their side. This is because every policy comes with the Squaremouth Zero Complaint Guarantee. This is a promise to mediate any customer complaint. Unless the travel insurance carrier resolves the complaint to the satisfaction of Squaremouth, that carrier will no longer be listed on the website.