Memory erasure is the psychic talent to erase, suppress, or wipe memories from the subject's mind. This talent can be accessed through telepathy. This ability is vital to guarding the secrecy of the supernatural world from the general populance.
The Master of the Kanima wields this power over his Kanima servant. Throughout Season 2, Matt Daehler psychically arranged to have his servant Jackson Whittemore forget he'd committed murders, including getting rid of evidence, such as the blood on his hands.
Werewolves can access this ability with a mind meld. In Season 3, Isaac Lahey had his memories of his experience with the Alpha Pack wiped from his mind. In Chaos Rising, Peter Hale was able to the implement the process the opposite way to recovering Isaac's wiped memories, but only partially.
Isaac fully recovered his memories using therapeutic hypnosis via an ice bath.
The pseudo-supernaturals, the The Dread Doctors are able to perform this ability to massive proportions by their use of electromagnetism. While experimenting on Kira Yukimura, they were able to induce memory loss of their prescence upon Kira herself, Kira's parents and an entire road full of people.