Invoices received without a quoted valid PO number may be returned to the council staff who placed the order so that they can obtain a valid PO number.
Efallai y bydd anfonebau sy'n dod i law heb rif archeb brynu dilys yn cael eu dychwelyd i staff y cyngor a oedd wedi cyflwyno'r archeb fel y gallant gael rhif archeb brynu dilys.