Yes it is, It's the form filled out, usually at and by the hospital but not necessarily so, and signed by a parent, usually the mother, a witness, usually the attending doctor or nurse midwife, and the hospital registar for a hospital birth. However, a "Certification" of live birth is not, which is what the image posted purports to be, is merely an abstract of some of the information from the "certificate", but probably not enough to determine "natural born" status.