There is also a requirement that the guide must include information about how to raise a concern or make a complaint, as well as information about the availability of advocacy services.
Yn ogystal, mae gofyniad bod rhaid i'r canllaw gynnwys gwybodaeth am sut i godi pryder neu gyflwyno cwyn, yn ogystal â gwybodaeth am argaeledd gwasanaethau eiriolaeth.