Local authority staff then use various methods to contact young people, including telephone calls, e-mails, letters, home visits and leaving calling cards.
Yna mae staff yr awdurdod lleol yn defnyddio dulliau amrywiol i gysylltu â phobl ifanc, gan gynnwys galwadau ffôn, e-byst, llythyrau, ymweliadau â chartrefi a gadael cardiau ymweld.