A Coleraine motorist who drove on after reversing into a car at Millburn Service Station in the town later failed to provide a specimen to police.
Jennifer Hargan (56), of Loughanhill Park, admitted charges of failing to provide a specimen; driving without due and attention and failing to stop, remain and report an accident.
The incident happened on April 11 this year.
The defendant was in the dock at Coleraine Magistrates Court on May 13.
A prosecutor said police received a report regarding a possible drink driver who had left the scene after a vehicle was struck at a garage forecourt.
Staff had smelt intoxicating liquor from the defendant who then reversed a Ford Fiesta and collided with a Peugeot vehicle causing damage to the bumper.
At a police station she failed to complete a procedure regarding a sample.
A defence solicitor said the defendant had been struggling to cope at the time as her father had been ill and passed away a short time later.
At the police station, the lawyer said, the defendant had given a first evidential sample but a second sample was not taken after police said she had two minutes to do it.
The lawyer said the incidents of April 11 were “out of character” for the mother of three grown up children.
The defendant was banned from driving for 14 months and fined £525.