In reply to tehmarks:
Does the ticket say Parking Fine (issued by council/local authority) or Parking Charge Notice (issued by whoever).
If the first, your options are limited, other than the details being wrong on the ticket, you are going to have to pay up. This will be enforced.
If the latter, a PCN, this is an Invoice issued by a private enforcement company, in which case I would ignore it. Someone will post in reply that you must pay all PCN, but I think he works for one of the firms.
Loads of info about this on the net.
If it is a PCN, and the details are wrong, I would throw it in the bin. They will send you some threatening letters, from them, their pet solicitors and fictitious debt recovery agents, threaten you with court action etc. nothing will come of it, they give up after about 3 months. (Longer if you engage in any sort of dialogue with them)
Post edited at 12:00