If you're going to town for the day on Fullers, it pays to book your day return ticket online (not available on peak days and certain weekends) because there is s substantial discount on the standard return fare. When you have finished your booking the note at the end of the print out says that tickets need to be picked up before 5pm at Matiatia, but this is actually incorrect. Jim Hannan told my partner that the Matiatia ticket office stays open until 6.30pm. So no rush.
Now if they could tackle the issue of the expensive surcharge on tickets sold on the wharf after that time due to the office being closed.