c3p0
OK so here are the facts c3p0 had been living on the lars homestead and he recognised padme and anakin even though he had not seen them for 10 years
so it comes back to the same old question in a new hope how come he didn't say oh master own its me c3p0 I used to live here and also on the subject of the lars home anakins mother was buried there so don't you think it is not a very good place to hide the young Luke skywalker what if Vader had returned to see the grave and stumbled upon him you know how powerful the dark side is he could have sussed out Luke was his son
I hope in episode 3 George does something with the droids that erases their memory otherwise I'm going to be very disappointed