Wrth i'r Bil fynd drwy'r Senedd, clywyd tystiolaeth gan ystod o gyrff, gan gynnwys Coleg Brenhinol Pediatreg, y Coleg Nyrsio Brenhinol, Cymdeithas Cyfarwyddwyr Gwasanaethau Cymdeithasol a phob heddlu yng Nghymru, sy'n cefnogi egwyddorion y Bil. Mae'r Bil hefyd wedi cael ei gefnogi gan nifer o elusennau plant gan gynnwys y Gymdeithas Genedlaethol er Atal Creulondeb i Blant, Barnardo's Cymru, Achub y Plant, Plant yng Nghymru a Gweithredu dros Blant. Mae Comisiynydd Plant Cymru hefyd wedi croesawu'r cam i newid y gyfraith.
In its journey through the Senedd, evidence has been heard from a range of organisations including the Royal College of Paediatrics, Royal College of Nursing, Association of Directors of Social Services and all police forces in Wales, which support the principles of the Bill. The Bill has also been supported by a number of children’s charities, including the NSPCC, Barnardo’s Cymru, Save the Children, Action for Children and Children in Wales. The Children’s Commissioner for Wales has also welcomed the move to change the law.