lol, much troll toll talk.
How about one of those toll passes but for parking. Ezpass is one for tolls.
Toll passes tend to be one time fixed rate payments that have a centralised processor they are usually prepaid or invoiced at regular intervals by the centralised processor.
Parking requires a check-in and check-out time, this is already done by a few companies that just use smartphones and/or ANPR entry and exit cameras, they then invoice the user either by post and/or charge the registered credit card.
After thinking about it what I had in mind was that the Refund system should be totally wallet based. Using a micropayment architecture so that the clients feel they have not lost control of their funds. Meanwhile, it will also reduce the calls to customer support.
Yeah, T(r)oll passes may be needed in some of the T(r)oll boxes around.
I have looked at the nLocktime, it is interesting, I will definetly look at implementing it. Problem is refunds for unused time aren't really given by any company, why would they want to give away money when coin machines and credit card payments do not, This could end up being just an unused feature as it would require the car park operator to offer it, it would be a great selling point to get the end user to use PKB rather than coin/card payments.
On a similar note, on coin machines you can overpay for example you pay £0.50p for a £0.30p ticket, this is basically a £0.20p tax free tip for the operator. This wouldn't happen when using PKB as you don't need specific coin demoninations to pay.