[HPforGrownups] Re: How can they tell who's a Muggle?/Masons

[Torsten]

No: HPFGUIDX 52405

>Finwitch wrote:
>>
>>I think that the Masons are magical, and that it was truly one of
>>them doing the Hoovering Charm, thus scaring Dobby away. Dursleys
>>don't know, the letter was sent to 'the wizard who did magic at
>>Privet Drive 4' - logic told the writer it was Harry, but magic told
>>the owl it was Mason (I don't know which, but the owl did)...

The letter was sent to Harry, because he's the only wizard there. Again, the Ministry 
can't detect who cast a spell, only that one was being cast (that's how the twins could 
get around the rule and cast the spells for their Wheezes during holiday). Since Harry 
was the only wizard around, the Ministry naturally assumed it was him, so he got the 
letter.

If you could adress a letter like in your example, Magical Law Enforcement would be 
able to solve every AK-murder case by sending one to "The wizard who cast AK on 
[enter name here]" and following the owl.

Also, for all we know you need to be able to see an object you're casting a charm on. 
This would rule out the Masons.

-Torsten