Lost and Stolen Cards Corporate Cardmembers should immediately notify Diners Club if a Card is lost, stolen, or cannot be used due to damage. Cardmembers should call Customer Service at 1-800-2-DINERS (1-800-234-6377). If Cards are lost or stolen outside the United States, the Caribbean or Puerto Rico, Corporate Cardmembers should immediately notify the nearest Diners Club Office or call collect at 1-702-797-5532. Emergency Card Replacement In an emergency, a replacement Card can be issued within one business day in the U.S. (48 hours overseas, depending on the country to which it must be sent). To minimize inconvenience to Corporate Cardmembers and enable continuous charge privileges until a new Card is available, we can authorize Diners Club charges by telephone at a Corporate Cardmember's request. To request authorization for such charges, Cardemembers should call Customer Service at 1-800-2-DINERS (1-800-234-6377). If Cards are lost or stolen outside the United States, the Caribbean or Puerto Rico, Corporate Cardmembers should immediately notify the nearest Diners Club Office or call collect at 1-702-797-5532. Fraud Protection When a Corporate Cardmembers notifies Diners Club that a Card has been lost or stolen, a Diners Club Customer Service Representative will review the most recent charge activity with the Corporate Cardmember to identify any potentially fraudulent charges. Once a Corporate Cardmember notifies Diners Club of the lost or stolen Card, he or she will not be liable for any unauthorized use of the Diners Club Corporate Card. Upon completion of the review, a Corporate Cardmember will be notified only if further information is required. To Learn More If you have any questions or concerns relating to lost or stolen Cards, please contact your Diners Club Representative.