NSO Late Registration?
Found some info that may help you in this website:
Late registration is a process that a person must undergo if the fact of his or her birth was not recorded with the LCR of the place where the birth occurred.
A person must likewise undergo the process of late registration if the fact of his or her birth had been previously recorded with the LCR but the records have been destroyed or cannot be located despite diligent search; and there is no existing copy with the National Statistics Office (NSO).
You can avail of their help in getting you late registered.