They had to know about PP (WAS Re: Secret Keeper of Grimmaud Place)

[potioncat]

No: HPFGUIDX 160534

 
> Charles:> 
> If indeed only the secret keeper can grant access to the place, then
> at the very least Hagrid had to know that PP had been the secret
> keeper for the Potters. We know that Hagrid knew where they were, and
> most likely DD as well. This means that Wormtail had to have been the
> one to tell them. This tells me that DD would have known that PP was
> the spy, not Sirius, IMO.


Potioncat:
In PoA Hagrid says that he didn't know Black was the SK. He didn't 
say, "I thought PP was the SK." he said, "I didn't know Black was."
So I'm not sure if he never knew the secret himself, or if he never 
knew the SK.

Now, the only reason Harry knows that DD is the secret keeper for 
headquarters is because Moody says, "Here's a note from DD." He could 
have said, here's a note from the secret keeper and it would have 
worked. I suspect he could have said, here's a note from Mickey Mouse 
and it would have worked. I do think the SK has to has a specific 
person in mind for the note or it won't work. I don't think the reader 
has to know who the SK was.