It is important that you provide any additional information as quickly as possible as a delay may extend the investigation time, or a result in a decision being based on incomplete information.
Mae’n bwysig eich bod yn darparu unrhyw wybodaeth ychwanegol cyn gynted â phosibl oherwydd gallai oedi ymestyn yr amser ymchwilio, neu arwain at benderfyniad yn seiliedig ar wybodaeth anghyflawn.