The general advice I have seen is not to pay and not to reply to them and hopefully they will go away....but im no legal expert. PCS also issued me with tickets. I appealed and the reply they sent rejecting my appeal didnt even cover the points I raised in my appeal. In my case I have a pretty good defense and wont be paying them. Do you have any photos of the signs they are using? If they are like the ones on the site I parked at they arent clearly worded and miss out on many of the points the BPA asks them to include as part of their code of practice. Does anyone know if its worthwhile complaining to the BPA? Also have a look at the ticket - the ones I have just have a date of issue and no time of infringement.