If you think you may have been the victim of fraud or cyber crime and had a financial loss, or have been hacked as a result of responding to a phishing message, you should report this to Action Fraud.
Os ydych yn credu eich bod wedi dioddef twyll neu seiberdrosedd ac wedi colli arian, neu os ydych wedi eich hacio o ganlyniad i ymateb i neges we-rwydo, dylech adrodd hyn i Action Fraud.