Prosecutors are expected to charge Israeli President Moshe Katsav with rape and other crimes against female employees.
It would be an unprecedented indictment against an Israeli head of state.
Mr Katsav has denied wrongdoing. His post is largely ceremonial and the scandal is unlikely to have a direct impact on Prime Minister Ehud Olmert.
Mr Olmert has himself been hurt politically by a string of investigations into suspected corruption, which he has denied.
The case against Mr Katsav appears certain to strengthen the feeling among many Israelis that misconduct is rampant at the top.
The scandal erupted last year when several former staffers filed complaints with police, accusing him of sex crimes.
The ministry said an indictment would include the charge of raping one of the four women who accused Mr Katsav of sexual assault.
In a statement, Attorney-General Menachem Mazuz gave the president a last chance to present legal arguments before a final draft of the indictment.
Asked on Channel 10 television if he intended to resign, his lawyer, Sharon Nahari, said: 'I think it is too early to say. What is important is that this is a very difficult day for Israel. We hope all will become clear after the hearing.'
The ministry said a date for the hearing would be set soon.
While serving as president, Mr Katsav can be put on trial only if he is impeached by parliament. He has said he would suspend himself from office if indicted.
He has been president since 2000 and is due to stand down in July.
