For competition or prize draw data, those not opted in to receive marketing data will have their data stored until winner has been notified (for up to 3 months).
Ar gyfer data cystadleuaeth neu dynnu gwobrau, bydd y rhai nad ydynt wedi optio i mewn i dderbyn data marchnata yn cael eu storio hyd nes y bydd yr enillydd wedi'i hysbysu (am hyd at 3 mis).