Marking attributes required based on other attributes
You can build a form to require an attribute that is based on other attributes. For example, if the user selects United States in the country attribute, you can require a response in the postal code attribute.
About this task
You can build rules on single-select attributes only. When the user selects the response that triggers the rule, another attribute becomes required.
Procedure
What to do next
When you add rules to forms, be careful not to make conflicting or circular rules.
If you edit rules on a form that is already published, you must publish the form again to use the modified rule.
When you change or delete attributes, Marketing Operations warns you if that attribute is used in a rule. If you delete the attribute anyway, the attribute is removed from the rules. If a rule is invalid, it is flagged in the rule builder for your attention.