You could require an answer to "Debit" or "Credit" before filling in card info.
The form resets when a user switches card type – "debit" or "credit". Then they have to re-enter info. You could require a "debit" or "credit" choice prior to card info so that an oversight mistake is less likely.
2
votes
![](https://secure.gravatar.com/avatar/27830028da44763221878799a287366f?size=40&default=https%3A%2F%2Fassets.uvcdn.com%2Fpkg%2Fadmin%2Ficons%2Fuser_70-6bcf9e08938533adb9bac95c3e487cb2a6d4a32f890ca6fdc82e3072e0ea0368.png)