Is star registration legit?

Could you elaborate on the legitimacy of star registration? I've heard about services that offer to name stars in the sky after individuals, but I'm not sure if these are genuine or just a gimmick. Is there any scientific or legal basis for such claims? Do these registrations have any official recognition? Additionally, is it possible for someone to purchase the rights to a specific star, and if so, what are the implications and limitations? Clarifying these points would help me understand the true nature of star registration.