Alerts and Unrestricted Sheets

I want to send automated alerts to contacts within a row of the summary of a row that was populated through a form. The contacts are outside of our organization and Smartsheet requires that I make the sheet unrestricted. Will the contacts getting the alert be able to see the sheet or access any part of the sheet information if I make it unrestricted? None of the contacts will be grated formal access to the sheet through the sharing options.

Best Answer