I received 2 calls at 9:52AM and 1:22PM today-3/17/16 from unknown name. Both times they left the following message: "The reason of this call is to inform you the IRS is filing a lawsuit against you. To get more information about this case file please call immediately on our department (415)363-0177. I repeat (415)363-0177. Thank you." SCAM!!! The IRS does NOT call you. They send you a letter with their letterhead on it. They DO NOT say please and Thank you. DO NOT call these scammers! Very Annoyed :-(