In that case, you are still using our platform's testing mode. You need to fill out an API key to link your website to the Mollie platform. There is a test key and a live key. When you use the test key, the 'TBM Bank' a.k.a. 'The Big Mollie Bank' will appear. It allows you to test whether the link is functioning properly and whether the status of the transactions is being processed correctly.
If you put your website live and want to start receiving payments, you need to replace the Test API key with the Live API key.
These keys can be found in your account under website profiles.