Jacquie Wright, 59, was told she had not bought a ticket when she left her red Renault in a car park in Evesham, Worcs.
She paid £2 for three hours on November 24 last year and the ticket shows she bought it at 12.01pm – five minutes after CCTV recorded her car at the barrier.
Jacquie left the Riverside multi-storey car park at 1.09pm – leaving her just under two hours left on her ticket.
Divorced Jacquie, who has two grown-up children and one grandson, was stunned when she received a letter from Euro Car Parks a week later demanding she pay £100.
The firm claimed she had spent a total of one hour and 13 minutes in the car park without a valid ticket.
Despite sending the company proof of her ticket – which includes the first three letters of her registration plate – the fine still stands.
Jacquie, from Evesham, Worcs., fumed: “The letter says I entered the car park at 11.56am, which sounds about right as I had an appointment at Specsavers at midday.
“I had paid the £2 fee which gave me until 3.01pm which was ample time.
“I left after about an hour and headed to Broadway to visit a friend.
“As far as I was concerned I’d paid for three hours but only used an hour of that time.
“The machine printed off the last three digits of my reg number so it proves I bought the ticket for my car.
“I was shocked when I received a fine from this company a week later.
“The CCTV from the car park even proves my case because I stayed for just over an hour – well within the time limit I had paid for.
“I called the company but with no success. I even tried to fill in the appeal section on their website but it kept crashing.”
Jacquie, who suffers from chronic spinal condition spongylitis, has missed the December 30 deadline to pay the fine.
She added: “I am worried about it going to court, but there’s no way I’m going to pay it – I will fight this to the end.
“They can threaten me with court action, bailiffs or whatever but they should know they have a fight on their hands.
“I am in the right. I have the proof I bought a ticket in that car park and they have proof I left the car park well within the time limit.”
