The My Nominations tab is displayed on both the Me section (top right of the page) and Tickets pages.
This area is where jobs that you have been nominated to respond and repair to will be displayed.
Clicking on the nomination link will take you to your nomination with full details of what is required on the Ticket or Inspection list where you can accept or reject the nomination.
Once you accept the nomination, this is timed and date stamped in both the nomination and comments section of the Ticket or Inspection list.