Kelly Ann Treble, 42, pleaded guilty to three counts of stealing property as a clerk when she fronted Wollongong Local Court on Tuesday.

Treble admitted to refunding varying items to herself from her register at BWS Wollongong that she did not originally buy.

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She used the same method on four occasions, with her actions captured on the store's security cameras.

The first time she stole $396 on February 5 and did the same twice on February 10 when she refunded herself $110 at 9.37am then just over an hour later another $204.

Before she finally pocketed $324 a day later.

Treble was confronted by an asset protection manager from Endeavour Drinks Company, which owns BWS Wollongong, on March 2.

She made full admissions to making the fraudulent transactions to the amount of $1034 before they agreed the stolen money would be deducted from her pay.

Police interviewed Treble on March 22 where she again owned up to her actions before she was charged.

Police said Treble was cooperative with her employer throughout the investigation and agreed to pay back $1077 immediately.

She admitted being a gambling addict who was trying to recover and was seeking mental health treatment, adding she was remorseful and "disgusted" with herself.

Treble, who is married with children, was terminated from her job, is looking for work and was financially supporting her family.

The case was adjourned to June 15 for sentence.

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