My Dad was drunk nung pinanganak ako and unfortunately maling maiden name ang nilagay nya. Instead of "Jimenez" (surname ng Mom ko nung dalaga pa sya), and nilagay ng Dad ko is "Sison" (maiden name nya). Can this be considered as clerical error lang ba that can be fixed sa munisipyo? or kailangan legal process na dadaanin sa hearing, etc..?? Hope to hear from you soon. Thank you and God bless..