In Indonesia, if a Muslim pray salat subh with du'a qunut, people say "He is a Nahdlatul Ulama (NU) Muslim". If a Muslim pray salat subh without du'a qunut but still placing their hands on belly, people say "He is a Muhammadiyah Muslim". If a Muslim pray salat with placing their hands on chest, people say " He is Persis Muslim".
Sometime I got this "funny" question : "Which Islam do you follow ?, Nahdlatul Ulama, Muhammadiyah, or Persis ?". Yaahh, in Indonesia many people still assume if NU, Muhammadiyah and Persis are madhab, not only Muslim organizations.
In reality, not every Indonesian Muslim is affiliated with one of those "The Big Three Muslim Organizations in Indonesia". I follow Shafi'i madhab, same like people of NU, but I am not a member of NU. Frankly, although Fatawa about Fiqh that I follow are Fatawa from NU Ulama, I still disagree with some (not all) traditions that committed by NU.
I am not familiar with Ijaza although I know what it is. My teachers taught me some Amal (in du'a form), but they didn't say "I Ijaza this Amal to you, and I give you a Sanad to Rasulullah (saw)".
Actually, in the true tradition, Ijaza is something special. A scholar Ijaza an Amal only to the selected students or to other scholar. That's why I was so surprised when I found a Habib in Jakarta is too easy to Ijaza an Amal through internet.