Judge Ruth said Seymour was living with her father and made 321 direct credit payments from his accounts to hers involving sums ranging $20 to $1500.
Seymour took $33,063 from August 2010 to March 2012.
Her father became aware of the fraud only when Gisborne District Council told him his rates were in arrears.
Seymour told police that her father "should not have trusted her".
Judge Ruth said no other criminal charges had been laid, but the victim believed other family members had also committed similar acts against him.
He had lost his retirement fund and would have to work until he dropped.