If you do - and especially if have one of them stuffed into the dark recesses of your desk or inside your George Costanza-size wallet, it's time to use them.
In 2009, TriMet added a foil element to the bottom of their various ticket media to help with fare inspections. Now, TriMet is phasing out all of the old non-foil tickets.
You have until April 30, 2012 before the tickets are invalid. You can also exchange them for new ones at TriMet's Pioneer Courthouse Square Ticket Office.