If a person owes us money but we do not have their contact details, in certain circumstances we can give a notice requiring a third party to provide us with those contact details.
Os yw’r person sy’n delio â’r cais yn ansicr ynghylch pa wybodaeth rydych ei heisiau, efallai y bydd yn cysylltu â chi i ofyn i chi esbonio eich cais.