The news comes just one month after the star's former business manager admitted to stealing more than US $7 million from the singer and other stars.
US prosecutors confirmed in January Jonathan Schwartz had been charged with fraud over claims he transferred Morissette's money into his own accounts.
Initially, Schwartz told investigators he had invested the cash in an illegal marijuana-growing business. But in a court room in Los Angeles he confessed to stealing as much as US $4.8 million from Morissette and more than US $2 million from other celebrity clients, none of whom have been named.
As a result, Schwartz - who handled the chart-topping musician's finances between 2009 and 2016 - is set for a jail sentence of between four and six years, assuming he is convicted on criminal charges.
According to his lawyer Nathan Hochman, Schwartz had co-operated with the investigation and accepts full responsibility for his actions.
The situation only came to light when Alanis appointed a new financial manager, who quickly noticed there were major discrepancies between her earnings and her balance.
-Bang! Showbiz
