<p>Hello, do I need to send a thank you note after receiving an email telling me I'm accepted just to be polite? (I'm an international student and I'm not sure about this~)</p>
<p>oh, btw, it's just an official email notification, not one sent to me by a specific admissions officer. I don't know if I'll attend the school yet.</p>
<p>No it's not necessary. However, once you decide on which school to attend, it would be very polite of you to immediate decline all the others -- so they can make offers to kids who have been waitlisted and want your unused slot.</p>