I inquired at Caloocan City Hall and they said I can do an addendum. But my worry is that it's just the local registry and not in NSO. I am a single mom and concerned that my son may later on have problems claiming for my insurance, on his records, etc. We may live overseas also so I would very much like to make all my records correct and would like to continue using Maria Amelia M. Abutin II as my name. 'Hope you can help me on this.