Co contact asking for child custody of evidence

[Jaz]

Co contact for 'Custody, Evidence' which document I need to provide? In my case both father and mother accomapanied the child to Australia on first entry, 2.5 years ago.
As per my understanding from the help section, no document to be provided of parents who accompanying the child. And Form 1229 is required only when,child is not travelling with both parents or legal guardians.