(up to 30 days), Visa permission is needed if your intended stay is more than 31 days 

Notice for K2 visa applicants (up to 30 days)

Required documents for inviting individual of K2 visa (31-90 days):

K2 visa applicant (up to 30 days) shall apply at Mongolian diplomatic missions and international border points with the following materials:

▪ Copy of passport or relevant valid substitute (must be valid for a minimum of 180 days before your intended travel to Mongolia);
▪ Official invitation letter is needed when traveling with family 
▪ Other necessary documents if needed (two way flight ticket confirmation)
receipt of payment
▪ Completed application form