Worklist Notification Invoice Approval - View Invoice Additional Details link

Hi.

If a user does the following;

1) Goes to their "Worklist Notifications"

2) Selects an "Invoice Approval" notification (which takes them to the "Invoice Action Items" page NotifDetailsPG)

3) Clicks on the "View Invoice Additional Details" link

Then the "View Invoice Additional Details" link takes them to a page entitled "Interactive Invoice Details" (InvPoReqNegoPG").

My question is, 'what happens if the worklist notifications have been purged?'. Is there another way to access the pages above?

I know that it is still possible to find the notification email and access the link sequence above, but that is cumbersome, and I was hoping that there is some responsibility which allows a user to access the same Invoice information in an easy way.