Never before released figures show more than 12,000 Western Australians received debt notices as part of the Turnbull government's bungled Centrelink debt-recovery program, according to the Greens.

In January, it was revealed more than 17,000 debt notices were sent out by the Federal government over the Christmas break, with hundreds of people around Australia complaining they were wrongly hounded for repayments.

A Perth woman claims Centrelink said she owed $26,000 - but they owed her $5k.

Now, WA Greens senator Rachel Siewert has obtained information from the Department of Human Services as part of the Centrelink senate inquiry, which found 12,021 Western Australians were issued robo-debt notices between July 2016 and February 2017.

During the same period 132,764 debt notices were sent out to people around Australia.