Local authorities are unable to pass on family details to external organisations such as Careers Wales, unless those families explicitly agree for their details to be shared.
Ni all awdurdodau lleol drosglwyddo manylion teulu i sefydliadau allanol megis Gyrfa Cymru, oni bai bod y teuluoedd hynny'n cytuno i'w manylion gael eu rhannu.