About a month later, Ms Stephens received a second letter confirming the changes, the ERA said.
The letter stated towards the end: "Rachel you must be aware this is your last chance. We will no longer be taken advantage of, we will however monitor what is happening and if we feel that nothing has or will change then your employment will be terminated."
On February 8, the shop till was short by $50.80 and Ms Stephens believed Ms Bates held her responsible for the missing money.
Three days later Ms Bates and the shop's other director, Christopher Arbuckle were at the shop and Ms Stephens requested a meeting to discuss issues raised, but was refused because Ms Bates said her tone was "aggressive", the decision said.
As Ms Bates and Mr Arbuckle left, Ms Stephens made a comment to the effect: "well you better hope your till is not down today then".
Later that day, Ms Bates fired Ms Stephens.
Employment Authority member Helen Doyle said Ms Stephens was not given a chance to address the letters and offer an explanation.
At best it was "unclear" if Ms Stephens' behaviour warranted warning letters, she said.
Tension on the day Ms Stephens was fired arose because she thought she was being accused of theft.
The dismissal was unjustified because there was no process put in place before Ms Stephens was sacked, Ms Doyle said.
She awarded Ms Stephens $4080 in lost wages, $6400 in compensation for hurt and humiliation and $217.90 for loss of KiwiSaver contributions.