Made4China-Service-B-V I still barely understand what you are asking. Can you please try in Dutch when possible (as it seems you have a Dutch company..)
In case users register on your platform then you can create a payment request at bunq for a specific account. Step by step;
- user registers
- you initiate a request at bunq to a specific account
- you forward a URL or QR to the request which the user can pay in his browser
- you verify the payment (polling or using webhooks)
- you do whatever else you want to do in your platform.
Again, I'm just guessing, I have no clue what you are trying to build / achieve so it is kinda impossible to help you like this. It sounds like you're building some kind of checkout register. But I can be completely wrong there. 😅🤔