The charges related to 10 property transactions undertaken during the second half of 2010. The total value of the fraud was $3.9 million.
Kumar benefited by arranging for her, and allegedly, Ms Letele's, contacts to make the initial purchase of the properties which were then on-sold to the mortgage recipients for a profit.
Following Kumar's earlier guilty plea, SFO director Julie Read said the office was concerned about the potential for more incidents of mortgage fraud in the current market.
"A market with high demand for properties and rapidly rising prices creates opportunities for individuals to exploit vulnerable buyers.
"Lenders and buyers need to be alert to this risk," she said.
Letele has pleaded not guilty and is due to in court for a two-week trial in August.