The board of Methodist Ladies College has issued a statement saying it expects sacked principal Rosa Storelli to repay more than $700,000 to the school.
"The board acknowledges Ms Storelli’s public comment this week that her remuneration has been overpaid for more than 10 years and that she will repay the college this money," the statement says.
"The board looks forward to a speedy restitution by Ms Storelli of the full amounts of these overpayments, which exceed $700,000."
However, Ms Storelli said she had only agreed to repay $100,000 relating to payments to her nanny. "Everything else is in dispute," she said. "We have never seen the workings out of $700,000, we know there are errors."
Ms Storelli said she had begun repaying the $100,000 in February after alerting the board to the overpayments in January.
The statement says the board commissioned the Deloitte review of Ms Storelli's remuneration in February this year.
It says she was given "comprehensive details in writing of the Deloitte findings as part of the natural justice process" after the review uncovered the overpayments.
Treasurer Tony Peake said that after detailed forensic financial analysis by Deloitte, the board’s unanimous decision to sack Ms Storelli was taken with "deep regret" but with "good governance" as the foundation for the decision.
However Ms Storelli said she had never received any detailed analysis.
She said that when she asked Mr Peake for the Deloitte report he replied: "It’s irrelevant now, you are terminated".
The board said it did not intend to address any of the other "misstatements and ill-informed commentary" made this week. It said the international search for a new principal had begun.
Board chairwoman Louise Adler said she acknowledged Uniting Church moderator Isabel Thomas Dobson’s rejection of a report, published in the Herald Sun, that said she "threw her weight" behind Ms Storelli.
"Moderator Dobson stated publicly on Thursday evening that she supports the board's right to terminate Ms Storelli," Ms Adler said.
She said Ms Thomas Dobson stated that she had made a formal complaint about the reporting of her views.
The board said it acknowledged the Uniting Church’s support in relation to Ms Storelli's dismissal.