Client cards and credit cards Client cards and credit cards
Client cards and credit cards

Our cards

Our Mastercard® und debitcard® also offers you the special advantages of a credit card that can be used globally, with the appropriate level of security. To use your cards in e-commerce, simply register your cards here:

Blocking hotline

available 24 hours a day, seven days a week including public holidays.

Domestic (toll-free)
Tel. 0800 588 78 25

International and from mobile phone networks
Tel. +49 201 3101-102

Online claims portal

Note on entry: At the beginning, an individual insurance policy number is requested: Please select the option "No insurance policy number received" below to start with the claim notification. In the further course, the following data should then be entered in the "Supplementary information" field:

  1. the name of the card-issuing bank = M.M.Warburg & CO
  2. the first six and last four digits of the credit card number (example: 123456######1234)

Online claims portall

Exchange rate

Click here to look up the exchange rates used for payment transactions with your card that were made abroad.

Look up exchange rates

Mastercard® registration
Debitcard Mastercard® registration

Credit card information online

Short introduction

From now on you can check your current credit card transactions online – fast and convenient. Furthermore you can find the account statements of the last 12 months and check the last three transactions using your mobile device (mobile phones, tablets).  

log-in for Credit card information online


You have problems using credit card information online? Then please write an e-mail to

First Data will be happy to assist you.