SEE-Clean Cooking: Independent results verification for the African Biodigester Component (ABC) For the independent verification of biodigesters constructed by enterprises participating in the African Biodigester Component (ABC) programme, an Independent Verification Agency (IVA) has been recruited. This role is executed by KPMG.The IVA is responsible for verifying that the results reported by the participating biodigester enterprises have been delivered and that agreed standards of service have been achieved.