The 41-year-old woman admitted falsifying receipts and on some occasions receiving refunds without providing proof of purchase.
Police said the offences involved $25,000 of goods. The crimes were spread throughout Perth including the local suburbs of Ocean Reef, Beldon, Joondalup, Banksia Grove, Greenwood, Warwick and Hillarys between September and January.
The woman will be sentenced in Perth Magistrates Court on March 22.
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