If you no longer have this, please telephone the Customer Contact Centre on 0300 062 5004 (Monday – Friday 9:00 – 16:00) and tell the operator your CRN.
Os nad oes gennych hyn mwyach, ffoniwch y Ganolfan Gyswllt i Gwsmeriaid ar 0300 062 5004 (dydd Llun i dydd Gwener 9:00 – 16:00) a dweud wrth y gweithredwr eich CRN.