More on succession and styles of address

[olivierfouquet2000]

> 
> Are "ma'am" and "sir" acceptable fallbacks according to protocol? 
> I've seen news footage of celebrities chatting with Queen Elizabeth 
> and addressing her as "ma'am." 
>  

One must also distinguish between subjects and other citizens. I have met Princess Anne 
and was asked to address her as "Madam" as I am of french nationality.

Olivier