More questions about Freelancer

Is it genuine website for work at home earning I want to post a job on freelancer , what documents are required and how will I pay to person I hire? Is it safe to share card details including CVV no. on freelancer website before getting hired for job? I just recently took a typing test and have a certificate letter. Do you accept that as proof of a typing test? Is there a way to upload it to you. Please return my $10.00 deposit. I sent a deposit of $10.00 to you and never used the services. How about returning my money? I hired a freelancer to help me with my project he told me 2- 3 days work...I deposited the appropriate funds and three months later the guy dissappea why they have closed my 100% verified account without any warning? I am creating tickets again and again but they are not responding to any of them? hi What to give as proposal ? when someone hires me why they are asking to transfer some amount into their acc and after completing task they will return it back?is it fake