A Woolworths payment system error has angered customers around Australia after it generated duplicate charges for transactions made at various stores in March.

Woolworths customers used the store's Facebook page to vent their frustration at the "extremely inconvenient charges" that have left the accounts of some overdrawn over the weekend.

The error is understood to have originated on the end of one of Woolworths' payment processors, Cuscal.

"Couldn't put fuel in the car and go to work because of this!!!" Trav Wilkins wrote.