Hi all, is there a way to capture the event when a PO is closed?

Yes, via UserEvent script

No, Closing a PO does not trigger a UE

options for detecting the close button is detecting that the record is viewed after closing

Does the PO save on the close? maybe a oldRec vs newRec comparison? Or maybe via a workflow and a status transition?

Alternative approach, creating a custom button for close which will close and then execute any logic which you want to execute

Booo NetSuite for this one. I ended up using a beforeLoad/status combo ... it works well.