In Reporting, click on the Find tab and find and click a deal. You will be sent to the Input tab and the data for that deal will be shown.
Click on the History button. A pop-up will appear showing you the history of the deal.
For dealerships who use auto validation, the history will show that the deal was validated by "DMS Process". For dealerships that use manual validation, the name of the person who validated the deal will be shown.