William Murphy's arrest has highlighted the vulnerability of the elderly, and 3 News has learned they're also being victimised more subtly through mail fraud.
Thousands of pensioners are scammed out of millions of dollars through fake lotteries each year.
Seventy-nine-year-old fraud victim Peter Clifford received a letter saying he'd won the lottery, and then another, and another.
"I did scratch my head a bit because I thought they seemed to offer a lot compared to other lotteries. I thought, oh well, unless you're in you don't know," he said.
So he kept getting in, posting $25 or $45 cheques to claim his winnings, as requested. When Peter's daughter Jane Clifford twigged, he'd spent $20,000.
"You sent away a few and all of a sudden you've got 15 to 17 letters in your mailbox every day," said Ms Clifford.
Experts say it's a huge problem amongst the elderly, but hard to quantify because it's what they call a "silent scam". In other words, many pensioners are afraid or embarrassed to admit to their families they've been ripped off.
Of $4 million lost in scams each year, it's thought about 60 percent of victims are elderly.
Ms Clifford says her dad's from a "trusting generation". And then there's fine print they can't read.
"There's also a chance that their address might be in customer databases that might be compromised... and they tend to move around less," said Jarrod Rendle, spokesman for Government service Scamwatch.
BNZ financial elder abuse specialist Bronwyn Groot says she knows of a man who got 169 in one day.
"Once you send away one cheque your name is then put on a scammers or suckers list," she says.
BNZ contacted Mr Clifford after a bunch of lottery cheques were cashed, but he carried on. He worked hard for his money and doesn't want others to suffer like he has.
Ms Clifford says privacy laws are important, but also thinks when it comes to elderly people, more could be done.