Sadly all ticket Editting is LOCK as of last week..... So pretty much it is a lost cause....

As for onsite registration... They will request for your ticket via paper or from your Eventbrite account using the Eventbrite App.. and then request a vaild ID to verify that it is you.

So pretty much they going to say what I am saying now...

There is No way to get a refund or give it to someone else.