Cal. Welf. and Inst. Code § 366.23
If a noncustodial parent is seeking placement or custody of a child, the social worker shall inform the caretaker that he or she has the right to provide the court with input regarding the placement of the child. The social worker shall provide the "Caregiver Information Form" to the caretaker to complete and request that the caregiver provide any particular information the caregiver might have regarding the noncustodial parent now seeking custody. If a report is required or otherwise due, the completed form shall be attached to the social worker's report to be filed with the court. If not, the social worker shall ensure that, if the foster parent completes the form, the completed form is returned to the court for review and consideration before the child is placed with the noncustodial parent.
Ca. Welf. and Inst. Code § 366.23