A pensioner in Adelaide has gotten some sweet revenge on scammers, pocketing $990 with a brilliant stroke of genius.

Sunrise reports a woman going by the name Teresa was conned by fraudsters last year when she received a phone call claiming they were from a company that owed her money.

She gave them her bank account details where they deposited a few hundred dollars into her account.

Having gained her trust, she then gave them more details which they used to scam her out of hundreds of dollars.

So this year, when Teresa received a suspiciously similar call, she knew what to do.

This time, she let them transfer her $990, then contacted her bank and the cops who froze the scammer’s account and let her keep the money!