Tata India Limited — offer letter whether fake or not

Address: Al safa , Elavacodu , Chadayamangalam (P.O.), Kollam, Kerala, 691534

I have git a letter from tata india limitted saying selected for job and asked to pay 200 rs for sending admit card and gate pass as courier . I have paid and then another letter was sent saying to pay 2350 as bond security .i paid that too and they are now asking to pay 3500 for direct joining security .
I dont know whether this is fake or not .