FAQs about our services
Frequently asked questions.
Here are the questions our personal and corporate Cardholders ask most frequently.
Questions and answers on Diners Club Rewards Program
If the FAQs have not answered your query, please call our Customer Service Centre on Telephone 0870 1900 011 (UK), 0818 300 026 (Ireland).
Alternatively, send us your query by e-mail at citicards.dinerschqueriesciti.com
Remember to always quote your Diners Club account number in all correspondence.