California Code, Probate Code - PROB § 6452

(1) The parent's parental rights were terminated and the parent-child relationship was not judicially reestablished.

(2) The parent did not acknowledge the child.

(3) The parent left the child during the child's minority without an effort to provide for the child's support or without communication from the parent, for at least seven consecutive years that continued until the end of the child's minority, with the intent on the part of the parent to abandon the child. The failure to provide support or to communicate for the prescribed period is presumptive evidence of an intent to abandon.