how can i tell if my old tickets have days left?

Parks, resorts, dining, attractions, vacations

I have old park hoppers 5 years old can I call or write with the serial # to 
find how many days i have left?
They can only be red at any ticket purchase center, or guest services
at Disney.

I find that a fine black sharpie ( type of black marker ) is great for
notes on my tickets.