If you think that someone you're not Facebook friends with sent you a private message, it won't show up in the regular conversation view.
Ọ bụrụ na ịchọrọ na onye ị na-abụghị ndị enyi Facebook zitere gị ozi nzuzo, ọ gaghị egosi na mkparịta ụka mkparịta ụka mgbe niile.