Rma packaging info

Hi there. Scan issued an RMA for me today for my Asus Rampage II Extreme mobo. I just wanted to ask about RMA packaging. How exactly am I supposed to pack my mobo? I'm going to put it into its original box along with all the accessories listed in the user manual. I have also kept the box that I got it in, I mean the big box in which mobo and other components came to me. So I was thinking that I will put the mobo's box into this big box wrapped into bubble film and air bags. I was also told to include a loose sheet of paper with the RMA number on it. I don't know if I have to label the big box in anyway. I mean do I need to put some address on the box for the DPD courier or something. I would much appreciate any help.
My RMA number is 229625.