Kensington Police allege the Coolbellup couple were involved in multiple fraud, including property bought with stolen credit cards.
The 34-year-old female, who had worked for Southcare in Manning, allegedly kept her employee badge and continued to visit clients in their homes when she no longer held a job with the the organisation.
Together with her partner, she is accused of stealing credit cards, jewellery, money and other personal belongings.
.Police identified five clients who had property stolen, but many others were unproven, they said.
Clients are aged between 60 and 101, many have dementia and have difficulty reporting and identifying stolen items.
The accused woman will appear on 41 counts of stolen or unlawfully obtained property, while her 33-year-old partner faces 42 counts of stolen or unlawfully obtained property.