NABC stand for Non-Availability of Birth Certificate. It is important and most mandate thing to get your name recorded in Municipal Corporation. Otherwise, your birth would be categorized as an unregistered birth. If you have misplaced or torn your birth proof, however, you could get it again. But, the competent authority shall issue the NABC (Non-availability of the birth certificate) first. It is a mandatory step to regain your original birth proof. Non-Availability of Birth Certificate (NABC) can be issued for unregistered birth of a person. NABC is an official document declaring that the birth records of a particular person are not available in records. They can mention reasons for unavailability of birth certificate in that statement. Work For NRI will scan an image of the certificate and send it via email, where physical delivery is needed within India, Work For NRI will send it by courier Free of cost, and the international courier will be charged extra.
I was fortunate enough to be an American citizen by birth and I have the birth certificate to prove it.
-Raul Labrador