You must make your complaint within 6 months of the event you want to complain about, or finding out that you have a reason to complain, but no longer than twelve months after the event itself.
Dylech wneud cwyn o fewn 6 mis i’r digwyddiad rydych chi’n cwyno amdano, neu o fewn chwe mis i ddarganfod bod gennych reswm i gwyno, ond heb fod yn hirach na deuddeg mis ar ôl y digwyddiad ei hun.