1) Muslim divorce not granted by courts are legally valid without necessasiting the often cumbersome process of filing a declaratory petition before the family court to get them validated.
2) Maharashtra government has now made life easier for married Muslim couples who have entered splitsville through the Shariat route. The state has carved an exemption for Muslims and clarified that Muslims who have taken or given divorce or dissolved their marriage through a talaq, khula, mubarat or talaq-e-taswiz will be treated as being validly divorced. They no longer have to still approach the family court or any other court of law to have such divorce declared as valid.
3)since you are in Karnataka Muslims would still have to produce a decree from the family court for various government authorities including passport and even marriage registratars to recognize it as legal