Department of Immigration and Citizenship
The following are useful links
Obtaining a passport
http://www.doyouneedvisa.com/passport/Chad
Online Visa Application
http://www.passportsandvisas.com/visas/chad.asp
Visiting Chad
Becoming a citizen
http://www.worldtravelguide.net/chad/passport-visa
Green Card
http://www.usgreencardoffice.com/qualifying-countries
Countries which do not require Visa to Chad