For several hours last week some customers at a Dapto Mall ATM got a bonus, with the machine dispensing $50 notes instead of $20s.
A caller to the Mercury said he used the Greater Building Society ATM on a wall outside Dapto Mall on Wednesday night.
He wanted to withdraw $180 but when the money came out, he ended up with $300 in his wallet.
The man didn’t realise the sudden windfall until the next morning, when he rang the building society to return the extra money.
He said he was told the error occurred when the ATM section for $20 notes was accidentally stocked with $50s.
A spokesman for The Greater confirmed the error and said less than $1500 in extra money was given out.
‘‘The issue occurred because some $50 notes were loaded into the wrong slot when the ATM was cashed up,’’ the spokesman said.
‘‘The very unusual error was realised on Thursday morning when the ATM was reconciled. A number of people that received the extra cash contacted the branch to report the error and return the additional money.’’
The spokesman also said The Greater could track who received extra money.