Russian Doll - let s step back a bit and try to appreciate any advice provided in this forum. I understand the degree of stress that you are going through but please keep calm. Carl 434 is correct that this is a public forum any you should expect any response whether you like the response or not so let s relax a but.
Moving on to your concerns.
Can the father be denied visitation rights since he is not giving support?
What is the legal basis for deciding visitation rights?
When you say legal basis may e you are asking if there is a SPECIFIC provision of law to address this matter. There is none for now. Only law on parental authority and custody. Philippine decisions however look upon US law, Philippines customs and traditions, as well as the best interest of the child in deciding matters of visitation rights. As the child cannot decide as of yet whether he/she wants to see her father, the court will be the one to decide and generally will use the best interest of the child doctrine. In case a denial of the visitiation rights is sought probably as humbly suggested by me through a PROTECTION ORDER, the grounds must be clear and convincing.
This is why earlier, I asked you wnat you meant when you say nanghaharass. Now, I have read your responses and you mentioned the following (1) constant texting (2) getting a lawyer. These are not sufficient grounds to deny the father from visiting his biological daughter/son. At best this might be looked upon by the Court in favor of the father as the father wants to be involved in the life of his son/daughter.
On the matter of unwilling to give support and the act of the father in brinGIng the child in drinking sessions or exposing the child to smoking, if you have photos or documents to prove these matters, at best you can have custody. But again visitation right is another matter. I am sorry but you cannot ABOSLUTELY deny the father s right to see his child. MAYBE conTRol the visitation rIght but not deny.
I confirm carl 434's advice. Mas may legal basis pa siya keysa sa akin.
Now going to the issue of adoption, you have to get the consent of the biological father.Section 9, paragraph (b) of RA 8552 states that the written consent of the biological parent/s is necessary. You can risk filing a case but i am not sure if the chances of the success will be good since judges can only act in accordance wil law. You can file an appeal then argue the merits why you decided not to get the father s consent. Lawyers can argue that the father's consent is optional but unless and until the law is changed, the consent is required.