RefID is a parameter for reseller identity.

If your RefID parameter is 78, then tell your customer to visit our page from

http://www.123hiddensender.com/?RefID=78

To sign in our reseller program, please email to support@123hiddensender.net to get your own RefID.

The follow link is the examples:

http://www.123hiddensender.com/reseller/test/homepage.asp?RefID=78

http://www.123hiddensender.com/reseller/test/homepage.asp?RefID=79