Travel Accident Insurance Claim Filing Procedures Who to Contact In the U.S., Diners Club at 1-800-2-DINERS (1-800-234-6377). Outside the U.S., call collect (702) 869-4927 Documents Required During Filing* Claim forms and instructions will be furnished upon request at the above phone numbers. A dedicated customer service representative will guide the caller through the claims process. *Important Notice - Written notice of the claim must be given to Diners Club within 90 days after the occurrence of any covered loss, or as soon thereafter as reasonably possible.