Okay, so I have this Joomla website that I maintain for someone. It has the components RSForm! Pro and RSEvents!Pro installed. Every once in a while, we have an event, and the signup for it will be through a RSForm!Pro-form. This works fine. The only thing I cannot seem to find, is how to add a payment reference (for example, a fixed code and the name of the person filling in the form, so a form-field) to the payment. Payment is through Mollie.
There is one form that has it working, but I cannot find where it is configured. So what I do now is copy that one form, leave the fixed reference in place and change the rest of the form completely. But it bugs me that I cannot seem to find this information :/