FAQs on our services
Frequently asked questions
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 0820 820 536 from France (0.12 € TTC/minute) or +33 1 70 75 51 16 from other countries.
You can also send us your queries and comments by e-mail to diners.customerservice
citi.com