If an application was rejected, the person will not be able to apply to that corp again unless the old application is deleted.  First open the admin console by going to https://nut.whatiswr0ng.com/admin/ or clicking the link

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Scroll down to the HRAPPLICATIONS section and click Applications

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Find the application in the list and click the check box next to it.  From the action drop down, choose "Delete Selected Applications" and click the "Go" Button

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Review the deletion and click "Yes, I'm Sure" to confirm deletion

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You've deleted the old application.  If necessary let the person know they can now put in a new application.