Merchants: Customer Care

We are happy to answer your questions and receive any suggestions you may have. Please complete the form below and return it to us. To speak to a member of our Customer Service team directly, please dial the phone number on your terminal.

Worldline Financial Services (Europe) S.A.
Atrium Business Park
33, rue du Puits Romain
8070 Bertrange
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Complaint to SIX Payment Services

Our primary focus is the satisfaction of our customers. If we didn’t fulfill your expectations, please bring your complaint to our attention.
A good way to submit your complaint is the contact form above.

Alternatively, a complaint can be resolved at any time with the assistance of an external party in accordance with the contact details below.