A stop notice must include information as to the grounds for serving the notice, steps the person must take to remedy the contravention, rights of appeal and consequences of non-compliance.
Mae'n rhaid i hysbysiad stop gynnwys gwybodaeth am y sail dros gyflwyno'r hysbysiad, y camau y mae'n rhaid i'r person eu cymryd i gywiro'r tramgwydd, hawliau apelio a chanlyniadau diffyg cydymffurfio.