Bernardo was convicted in 1995 of the kidnappings, rapes and murders of southern Ontario teenagers Kristen French and Leslie Mahaffy, crimes he carried out with his then wife, Karla Homolka.
The Toronto Star, citing Correctional Service Canada notices sent to Bernardo's victims, reported the day parole application.
At his sentencing for the French and Mahaffy killings, Bernardo was given life in prison without the possibility of parole for 25 years. After pleading guilty to 14 sex assault as the so-called Scarborough Rapist, he was also declared a dangerous offender, something that makes parole highly unlikely.
Bernardo was one of the most infamous inmates at the Kingston Penitentiary in Ontario before it closed in 2013. He was moved to another maximum-security prison.
His ex-wife Homolka was released from prison after serving a 12-year sentence. As of 2012, she was reportedly living in the Caribbean under a different name, with her three children.