The school has said it communicated with the family by sending letters as well as making contact through community agency intervention.
The girl's father said the case had cost his family a substantial amount of money and emotional turmoil.
It had compromised the health of the girl's mother, who had been suffering from stress for the past two years and had had to give up her job.
Defence lawyer Louise Elder told Judge Susan Thomas the girl had now finished school and was not due to return to the education system. "It seems pointless from a practical point of view to carry on [with the case] when the child is no longer in the system," she said.
Lawyer James Elliot, who was representing the school, said the board was required under the Education Act to pursue legal action.
Judge Thomas said it would be surprising if there had been no communication.
The judge adjourned the case until March to allow further discussion by the school's board of trustees.