The victim grew concerned when she noticed her funds were rapidly disappearing.
Moore reassured the woman she “would never steal money from her”, court documents said.
When police investigated, they found Moore had made a large number of unauthorised personal purchases from various stores around Dunedin.
A cash amount of $3000 was also withdrawn, bringing the total of stolen funds to $5473.
“This offending was mean,” Judge Jim Large said.
“You had a position of trust with your victim and you breached that trust — not just once but obviously on numerous occasions,” he said.
Judge Large noted the woman had a conviction for theft in a special relationship from 2005, calling her offending “exactly the same”.
“This would indicate an underlying dishonest trait that you need to deal with,” he said.
Moore told police she was remorseful for her actions and had taken the funds due to her own “financial hardship”.
“I don’t doubt your 77-year-old victim had her own financial stresses ... she was effectively watching her pennies,” the judge said.
“You had no right whatsoever to take this elderly person’s money ... people that age do not need that amount of stress.”
Moore was convicted of dishonestly using a document and was sentenced to four months’ community detention along with 12 months’ supervision.
She was also ordered to repay the $5473 at a rate of $20 a week.