A lottery has been set up for fans to obtain the free tickets -- and they can sign up for the random drawing on the Staples Center website ... good luck logging on.
17,500 tickets are available for the event -- 11,000 for Staples and 6,500 for Nokia -- which will be divvied out 2 per person. If you are one of the 8,750 people selected, you will then be alerted on Sunday with further instructions.
Oh yeah ... only U.S. residents can apply.
Also, the family wouldn't say if Michael's body would be at the memorial.