Is it possible to find a playstation id even if the box it came in was thrown out?

Question

If so how do you go about doing that.

Answer 1

You have one sticker at the back with s/n, another sticker with info model located on the bottom part.

Answer 2

I'm not sure if the playstation id is on the box, I think that it's on the back of the PS3. The serial number is a white sticker with black lettering on the back of the PS3.

I kept my box that my PS3 came in, but I doubt that Sony would put any important information on the box because they know that people might throw out the box.