What are the signs of multiple personality disorder?

Dissociative ID: Amnesia, dismembered comments, actions, travel and purchases. People claiming to know you but you don't know them and they call you by a different name, blocks of time missing from your day, acquired possessions you don't recognize, clothing you would never wear, bruising without injury, hang-up phone calls that are frequent, waking up in the bed of a total stranger, and many more.

Multiple personality: MPD, now called dissociative identity disorder is characterized by two or more distinct identity states known as alters in addition to the patient him/her self. These identity states will seem fragmentary and partially unaware of the others, each with varying degrees of disturbance, The alters tend to be more active and aggressive, while the patient's core personality will be more passive.