<prompt> Human: I got a letter from the IRS today containing the following: We sent you a tax refund for the period ended Dec. 31, 2013. However, the Postal Service returned it as undeliverable. We want to reissue the check to you, but we need your assistance. Please complete the information in the spaces at the end of this letter.Please provide the information by Mar. 08, 2016. If we dont hear from you, we will assume you no longer need our help, and we will close your case. We have enclosed an envelope for your convenience. If you have any questions, please call NAME REDACTED at XXX-XXX-XXX note: Austin phone number, not 1-800 or any other special prefix between the hours of 6:30 a.m. and 2:00 p.m. CST. If you prefer, you may write to us at the address shown at the top of the first page of this letter. Whenever you write, please include this letter and, in the spaces below, give us your telephone number with the hours we can reach you. Keep a copy of this letter for your records.The letter is signed Paul J. Morgan, Operations ManagerThe return address is the IRS office in Austin.I checked my 2013 return, and it does not show a refund. In fact, I underpaid on my estimated taxes and owed them.My gut instinct tells me this is a scam. Theyre hoping Ill call that number instead of sending the letter to the IRS, and give them all my info or worse.Anyone seen one of these before? Is there a number I can call to check? My other worry is that someone else filed a fraudulent return and Ill need to clear something up. Also, the letter contains my SSN, which is a bit unnerving.  <response>: Call 1-800-829-1040 M - F 7am - 7pm local time and speak with a representative. 