Hello @gbordawekar, it looks like you can enable client side validation for Payment Pages 2.0
Client-Side Validation : Select Enable client-side validation to check the required fields for values.
If the client-side validation is enabled, you can specify a custom error message for missing required fields in the Error Message field.
Use the variable, #fieldName, in the error message to include the missing field name. For example, "Please enter a valid #fieldName to continue."
If you are unable to select or view this feature you may need to put in a suppor ticket to enable it.
https://knowledgecenter.zuora.com/CB_Billing/LA_Hosted_Payment_Pages/B_Payment_Pages_2.0
Randi
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