Now most of the people don't know the KYC (Know Your Costume). Most of the process ask the people KYC document. So don't share the your KYC other person. If need to send for some process. First check the website. Then send it. Nowadays toke sell it will be ask for the KYC document. If you know it trust one. Then send it and complete the process. Finance and most of the complete get the people KYC document. If apply any loan KYC important. So KYC in careful to use. KYC is your personal information. So safely share.