How do I securely and successfully collect payments with the QR code sticker?

Once the customer has completed the transaction, have them show you the confirmation screen on their smartphone. Please look out for the following security elements:

The confirmation screens can change from one app to the next. The items listed above are, however, identical in every app.

Otherwise, you can check all of the transactions you have made in the merchant portal at any time.

You can also set up SMS and/or e-mail notifications for incoming payments. The corresponding setting can be made in the merchant portal. Here are the instructions for setting up these notifications.