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Do you have questions and suggestions to our webshop? Please use the contact form given below to get in touch with us.
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Contact
Fill out the contact form. We will then get in touch with you directly.
Make an appointment
We will find a date for an exchange.
Discussion
We will find out more about your business and work with you to see how we can support you.
FAQ
Can I switch from one product to another?
Yes, you can adjust your product to your needs on an ongoing basis via the checksum portal. Of course, the current tariff will always be charged.
Can I change my payment processor?
If you wish, you can instruct us via the checksum portal to obtain various offers from payment processors (acquirers) on your behalf. You can then decide which payment processor you would like to submit an application to conclude a contract with.
Kann ich mein Zahlgerät auch über WiFi betreiben?
Can I also operate my payment device via WiFi?
How can I pay via QR code or barcode?
To accept payments via QR or barcode with a smartphone, you need a mobile payment app that works via QR or barcode (e.g. TWINT). As a merchant, you need an acceptance contract with the relevant payment processor. During the payment process, the QR or barcode generated on the payment device must be scanned. As soon as the cash register reports that the payment process has been completed, the payment process is finished.
What happens if a payment is rejected?
If the payment process is cancelled, try again. In the second step, ask your customer which payment method he/she has stored in his/her mobile payment app. It is possible that you have not activated this payment method (e.g. American Express credit card). Ask your customer whether he/she can pay with another payment method and contact checksum support if you have any further questions.
