The jurors in the trial of former solicitor Michael Lynn have been sent home and will resume their deliberations in the morning.
They have been told that the judge will now accept a majority verdict on which at least ten of them agree.
Mr Lynn denies stealing almost €30 million from seven financial institutions in 2006 and 2007 by getting multiple mortgages on the same properties without the knowledge of the institutions.
Mr Lynn told the court in evidence that the banks knew what he was doing, that they were aware of the multiple mortgages and that he was using the money they gave him to fund his property developments abroad.
The prosecution said his story was a pack of lies and he stole the money "pure and simple".
Judge Martin Nolan told the jurors they would have to decide if what had happened was a fraud perpetrated by Mr Lynn or a charade between Mr Lynn and the banks.