Will advice na din:
As per RA 8552, the Domestic Adoption Act.
One of the effects of adoption is stated in Section 17 of thislaw, which provides that the adoptee shall be considered the legitimate child of the adopter for intents and purposes, and as such entitled to all the rights and obligations provided by law to legitimate children born to them without discrimination of any kind. Further, Section 18 specifies that in succession, the adopter and adoptee shall have reciprocal rights of succession without distinction from legitimate filiation.
I agree sa above post that you better go directly sa DSWD office with regards to Domestic adoption concern.