Victoria's Corrections department has apologised to the Supreme Court for a case of "mistaken identity" that saw the wrong man brought before court to be sentenced for murder – apparently the second time this occurred.

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Peter Brown, 57, was due to be sentenced on Thursday morning after pleading guilty to fatally bashing Melbourne mother Simone Fraser with a brick and a golf club at a Rockbank property in March after an argument about money.

Brown then used her credit card to send money to a woman overseas and dumped her body 300 kilometres away at Mulwala in NSW.

A man named Peter Brown was brought to court, but Justice John Champion's associate immediately recognised it was the wrong person.