you stop or suspend payment of any debts or are unable, or admit in writing your inability, to pay your debts as they fall due;
Os na allwch ffeilio neu dalu eich treth i ni ar amser oherwydd eich amgylchiadau, dywedwch wrthym cyn gynted â phosibl, a chyn i'r ffurflen dreth neu’r taliad fod yn daladwy.