It needs to be maintained for 6 years from the later of the day on which the claim was made or the day on which the record of the claim was most recently updated
Mae angen cynnal y cofnod am chwe blynedd naill ai o’r diwrnod y gwnaed yr hawliad neu'r diwrnod y cafodd y cofnod o'r hawliad ei ddiweddaru ddiwethaf, pa un bynnag sydd fwyaf diweddar.