Scammers posing as debt collectors are using clever tactics to sound more convincing to their victims. They frequently use fake phone numbers and official business names. The do research so they will know a social security number or a home email address.  Tony Green in the Oregon Attorney General's Office says they've received lots of calls lately about these types of scams.  To report one, or get more assistance call the State's Consumer Hotline: 877-877-9392.