The "first" chapter summary PoA 1-2

[Caius Marcius]

No: HPFGUIDX 17922

--- In HPforGrownups at y..., catherine at c... wrote:


> 
> Is there some kind of wizarding rule which states that 
> parents/guardians of muggle born witches and wizards should be 
aware 
> of what is happening - and that they therefore shouldn't have 
memory 
> charms placed on them?

That seems to be the case - in Cos (Chap. 5), Dumbledore tells Harry 
and Ron that he will be informing both of their families of the 
Flying Ford Anglia incident. Ron gets a Howler from his mother as a 
result, but as Harry reflects, "As for Dumbledore's writing to the 
Dursleys, that was nothing. Harry knew perfectly well they'd just be 
disappointed that the Whomping Willow hadn't squashed him flat."

   - CMC