Miami, Visa:

The Schengen Visa allows tourists from around the world to go to Miami. As Miami shares is in the USA Area, it shares a common border policy with the other countries. This means that tourist visas are not issued for individual countries such as Miami, but for the entire region. As a specific tourist visa for Miami does not exist, tourists need a Usa Visa to enter Miami for tourism. The USA Visa allows visitors to spend up to 90 days in Miami as well as the other participating Usa countries.

To apply for a Usa Visa, you need to visit a Miami embassy or consulate in your home country. All embassies and consulates of all the Usa countries accept visa applications, but you have to apply at the diplomatic office of the main destination you plan to visit.

for more information, please visit USA: 

https://www.schengenvisainfo.com/USA/visa/

Official Invitation Letter:

Official invitation will be sent to attendees once after registration. The invitation letter will be sent to those who requested it through mail only.