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Tena W.Tena W. 

"create case form" communities

Am I correct that in order to have any validation in communities for the communities I need to recreate the whole page?  I can't add validation rules in via another method. 

Suggestions. 
Rahul KumarRahul Kumar (Salesforce Developers) 
Hi Tena,
Create Case Form
The Create Case Form component searches text as it’s being entered into a case and displays articles based on the typed text. If users don’t see an answer, they can contact support for help. You can also protect your community from spammers by adding a reCAPTCHA widget that guest users must complete before they create a case.
Please refer the below link for reference. Hope it will be helpful.

Please mark it as best answer if the information is informative.so that question is removed from an unanswered question and appear as a proper solution.

Thanks
Rahul Kumar
 
Tena W.Tena W.
There are global actions that you can use in the contact us page.  However, it doesn't hit the validate that email is an email address, something it does when you use the action internally. Can you wrap checks (javascript) around SF standard communities objects? 
Kyle HandleyKyle Handley
Looks like this functionality is built in now.