TASMANIA'S workplace watchdog has recovered more than $50,000 in backpay owed to ripped-off workers, new figures have shown.

The Fair Work Ombudsman has released figures to the Mercury showing $52,500 in backpay for workers had been recovered.

The largest recovery was $21,000 for a mechanic in Hobart who was underpaid his minimum hourly rate, penalty rates and annual leave.

After Fair Work inspectors contacted the mechanic's employer, the worker was promptly reimbursed without the need for further action.

Fair Work Ombudsman executive director Michael Campbell said the underpayment was a result of the employer's lack of knowledge of award rates.

"Informal agreements between employers and employees must not undercut the minimum entitlements set by an industry award," Mr Campbell said.

Mr Campbell warned businesses without human resources staff not to get caught and face hefty fines.  

He warned them to seek advice from the Fair Work website which provides information for employers and workers in retail, cleaning, clerical, hair and beauty, security and horticulture industries.

In a separate case, a worker at a Hobart car and caravan detailer has recently been reimbursed almost $13,000 after being underpaid the minimum hourly rate.

Other recent recoveries include: $7500 for a Devonport waitress not paid her minimum hourly rate or annual leave entitlements. $5700 for a casual Hobart construction worker not paid the minimum hourly rate and penalty rates for overtime. $5300 for a Hobart security technician not paid annual leave.

For more information visit the Fair Work Ombudsman website at www.fairwork. gov.au.