B2L2

Diamond parking again.  Many years ago, I also had my FINAL notice without physically having a ticket.  And the funny part was that the ticket was from a place that my car never visited.  So obviously that ticket was wrong, but they don't listen.

Soon, their collector agent started bugging me (it is actually they own department, just diff name).  Like you, I don't want to bend backward to pay for this bogus ticket.  I sent letters and my wife helped talking to their agents (she is better in bargaining) a number of times.  First they offer to reduce the ticket price which is BS.  Anyway, after many calls, they took it out.  All you need is lucky to have a good agent on the phone with you that day.

I hated Diamond so much since then.  Yes, be strong and firm, and prepare to spend time with them.  Like other said, even their collect agent can't do much harm to you, so don't need to worry on that part.