Cardholder
We help you
Customer Services - available Monday to Friday 08.00 - 18.00
Private customers
Telefon +31 (0)20 654 55 00
Fax +31 (0)20 654 55 04
Corporate customers
Telefon +31 (0)20 654 55 14
Fax +31 (0)20 654 55 06
Card-blocking service (24 hours a day, 365 days a year)
Tel. +31 (0)20 654 55 11
Please contact us immediately in case of loss or theft of your Diners Club Card. We will provide you with a replacement card wherever you are in the world – and of course free of charge!
You can also send us your queries and comments by e-mail to diners.customerservice
citi.com
Please remember to quote your Diners Club account number in all correspondence.