The trial began last Thursday and was meant to conclude last Friday, but it has now been adjourned until 4-5 April 2016.
Proceedings closed early on November 5 after Magistrate Roger Brown decided that defence witnesses needed to be given time to consult lawyers.
Magistrate Brown then agreed on November 6 to further extend the trial after the questioning of witnesses took longer than expected.
The case involves three agency agreements that were signed in October 2014 for properties in the Sydney suburbs of Double Bay, Surry Hills and Paddington.
This is a landmark court case as it is believed to be the first prosecution of its kind under the Property, Stock and Business Agents Act 2002.
NSW Fair Trading is bringing the case, which is being held at Parramatta Local Court.