FAQs on our services
Here are the questions our Cardholders and partners ask most frequently.
Here are the questions our Cardholders and partners ask most frequently.
Questions and answers on our online services
If the FAQs have not answered your query, please call our Customer Service Centre on +32 (0)2 626 50 24.
Alternatively, send us your query by e-mail on diners.customerservice
citi.com
Please remember to quote your Diners Club account number in all correspondence.