tag:www.gov.uk,2005:/search/services Services 2023-02-15T00:00:00+00:00 HM Government tag:www.gov.uk,2005:/government/publications/submit-rtfo-and-saf-mandate-chain-of-custody-evidence 2023-02-15T00:00:00+00:00 Submit RTFO and SAF Mandate chain of custody evidence Use this form to record how feedstock has been processed into fuel and its journey to the UK duty point.