Jayne Chapman, 52, of Lansdowne Crescent, pleaded guilty on Monday.
She was parked in a disabled bay on Wellington Street in the town centre without the badge holder being present.
Charges were brought under the Road Traffic Regulations Act 1984 - Chapman was fined £293 and ordered to pay additional costs of £220 and a victim’s surcharge of £34, a total of £547.
Coun Alan Gardiner, cabinet spokesperson for core services, added: “Blue badges are vital for people with mobility problems, giving them the ability to go about their daily lives.
“Many blue badge holders use their badges legitimately, but a minority misuse them for their own benefit.
“This means that there are fewer disabled parking bays available for those who really need them.
“These convictions send a clear message to people of the consequences for misusing a blue badge.
“It’s a criminal offence that could result in a fine of £1,000 and confiscation of the badge.
“Our team will continue to investigate all fraudulent use of blue badges and wherever appropriate will submit cases for prosecution.”