In February 2015 she was called to a disciplinary meeting and told the gaming machines were down $1000.
Hills told the ERA she signed notes of the meeting, which included an agreement to pay back the $1000, under duress.
The $1000 would be paid back by cashing up seven days' outstanding leave and paying the balance from her wages, the meeting's notes said.
Member of the Authority Michael Loftus accepted Hills only agreed to the measure of deducting the money from her wages under duress, and found the deduction of pay was unauthorised.
Hills was dismissed during a time when the hotel had experienced a damaging fire and was closing.
There were concerns that her partner may have removed items from the hotel without authority to do so, as well as problems with the manager of the hotel trusting her.
Ultimately, Loftus found Hills had been unjustifiably dismissed.
"There are too many factors which influenced this decision which were either not put to Ms Hills or for which there is no evidence she was accountable," Loftus said.
Hills was awarded $3200 in lost wages and wages deducted for gaming machine shortfalls and $6000 compensation for hurt and humiliation.
Read the full decision here: