California Refusal To Give Consent To Adoption-Alleged Natural Father is a legal process by which a biological father who has not been formally identified, but who may be the father of a child, can refuse to give consent to an adoption. This type of refusal can be used when the natural father is unknown or cannot be located, or when the father is known but has not established paternity rights. Specifically, the alleged natural father can file a petition in the county of the child's residence to refuse consent to the adoption. This type of refusal can also be used if the natural father is a minor or otherwise lacks the capacity to give legal consent. There are two types of California Refusal To Give Consent To Adoption-Alleged Natural Father: voluntary and involuntary. A voluntary petition is one that is filed by the alleged natural father himself, while an involuntary petition is one that is filed on behalf of the alleged natural father by a third party.