Cardholder

We help you

Calling from the UK: 0870 1900 011
Calling from Ireland: 0818 300 026
Fax: 0870 197 4536
24 hours a day, 7 days a week

You can also send us your queries and comments electronically.

Card-blocking service (24 hours a day, 365 days a year)

calling from the UK: 0870 1900 011
calling from Ireland: 0818 300 026
international: +44 1 252 513 500

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!