They are based on the Relatives and Guardianship courts that who's the Child’s custodian and that's a Guardian. Custody can only be presented to a biological dad or mum of a child whilst Guardianship is provided to any non-biological mother or father with the ideal to care for a minor. https://gunnerzwswp.newbigblog.com/37103107/the-definitive-guide-to-guardianship-lawyer-in-karachi