A Gowrie woman who went on a spending spree with stolen credit cards has been ordered to perform 105-hours community service.

Nicole Amy Kelly pleaded guilty in the ACT Supreme Court to 35 fraud charges after misusing three credit cards left by customers at her workplace last year.

The court heard Kelly took five credit cards which had been accidentally left by shoppers at the Tuggeranong Hyperdome chemist where she worked.

Between August and October, she used three of the cards to rack up $1380 in purchases online and at the Tuggeranong mall.

Most of the purchases were low value, including books, a poster, clothing, headphones and a movie.

The theft came to light when Kelly turned herself into police and confessed to the offences.

The court heard the 21-year-old handed over the items to officers when they came to her Gowrie home.

She has since repaid the full cost of the purchases to the three banks which issued the cards.

A pre-sentence report said Kelly posed a low-risk of reoffending.

Justice Hilary Penfold said the student's admissions to police, her early guilty plea and clean record entitled her to leniency.

She said a term of imprisonment was unnecessary.

The judge recorded convictions to 24 counts of obtaining property by deception and 11 charges of dishonestly obtaining a financial advantage.

Justice Penfold ordered Kelly to perform 105 hours of community service, pay a $500 security and sign a 12-month good behaviour bond.