The travel agency owners' annoyance about the prompt police action when Prime Minister John Key laid a complaint over a recorded conversation between him and John Banks sparked a front page story in a local newspaper.
Mr Miller said Balm had confessed to her bosses but it took police "some time" to respond.
The publicity triggered the involvement of Police Commissioner Peter Marshall, who apologised to the complainants for the delay.
His client had been arrested, was fully co-operative with the police and admitted her guilt.
The initial figure - alleged to be around $80,000 - had been reduced considerably, the lawyer said. It was now $20,000 "all up".
A police summary of facts, which was not read out in court, needed to be amended.
Judge Wainwright ordered pre-sentence and reparation reports. She remanded Balm on continued bail.