Setting additional fields to be required

[CnP.Support]

Matthew,

Our FaaS processor will return ERROR in case a required field is not passed or is NULL. We don't do any validation on other questions or fields.

All validations need to be done by you. Please note that you are not loading any scripts so we have no way of validating a form prior to it being posted to us.

[Matthew]

Does C&P provide a way to mark additional fields as required, beyond those needed for the transaction? Or is this something I'll have to code verification for myself?