SRC user selections that can prevent requestor from submitting

We are using SM 9.50 and I am building out Request items. I have a business requirement to add qualifing questions to some of the items.

For example, having a question such as: "Is the transaction a credit card transaction?" with the options being, Yes, or No. If the user selects Yes, I want to display a message such as "Credit Card transaction can’t be voided. Request cannot be processed." and then prevent the user from submitting somehow.