ok, here's what i used to do when i lived in south philly & parking was at a premium. let the tickets rack up. they won't threaten to boot until it's at least a couple thousand. once you start getting the letters threatening to boot, change you tag. go to the corner title & insurance store. tell them soneone stole your tag. get a new one. the clock starts ticking all over again. F-the PPA. I will never pay a PPA parking ticket.