The model
SFS Network Mass Balance
Eligible renewable fuel and accepted sustainability evidence may enter a declared corporate fuel network at one location, while an equivalent certified quantity of physical fuel is supplied to a customer from another location in the same country and declared network.
Important to understand
The same renewable molecules are not necessarily delivered to the customer
SFS allocates the renewable attributes of fuel within a controlled network. The physical fuel supplied to the customer meets the applicable EN590 or EN228 specification, and fuel quality certification remains outside SFS scope.
The critical controls
One-to-one allocation
Each renewable quantity is allocated once only. A quantity cannot support two customer supplies and characteristics are never combined or averaged.
Physical fuel in and out
Renewable fuel must physically enter the declared network, and physical fuel must be supplied to the customer from a location within that network.
Separate EN590 and EN228 balances
Each fuel pool holds its own credential balance at Member, Country, Declared Corporate Network and Fuel Pool level. Pools are never merged.
Closing physical-stock support
Carry-forward at the end of a verification period is limited to the lower of unallocated credentials and eligible physical closing stock.
No negative credential balance
Issuance is blocked by server-side transaction controls where an allocation would exceed the available balance or the physical delivered volume.
Public certificate validation
Anyone holding an Evidence of Sustainability can confirm its current status through the SFS Certificate Validator or its QR code.
Periodic SFS verification
Each network is verified on a recurring cycle no longer than three months, covering reconciliation, source documents, stock and carry-forward.
Boundary
Where a credential balance lives
Member -> Country -> Declared Corporate Network -> Fuel Pool Fuel pools: EN590 Diesel | EN228 Gasoline (always separate)