Every Payment Processor has their own unique fees and we want to allow you the flexibility to charge a custom fee that may not be supported by the current options.
By Choosing the Advanced Field type you will be able to request a custom Convenience Fee to be added to the platform. There will be text below the Advanced field option that has a link to a form that you can use to request your custom field.
Here is another link to that form if you would like to request that custom Convenience Fee: