The Welsh Government accepts that there is very small risk that a householder (or their partner) could be liable for council tax but not be responsible for paying the utility bills.
Mae Llywodraeth Cymru yn derbyn bod risg fach iawn y gallai deiliad tŷ (neu ei bartner) fod yn atebol i dalu'r dreth gyngor ond na fyddai'n gyfrifol am dalu'r biliau cyfleustodau.