Fake TK Elevator Job Offer Demands Electronic Check

Employment Calls and states that he is an HR Representative for TK Elevator. I did an interview and received an acceptance letter on TK Elevator letterhead. He wants me to take an electronic check and buy office supplies. The last scam I had did the same thing as this guy is doing. He gave me three different electronic checks that were not accepted. This individual is impersonating TK Elevator and using me in his scam.