FAQ

Yes, the parallel verification of biomethane quantities in both verification systems is possible and even necessary in certain cases.

One example of this is the use of biomethane within the framework of the Fuel Emissions Trading Act (BEHG). On the one hand, this requires proof of sustainability, which is recorded via the BLE's NABISY system. On the other hand, additional criteria that are not covered by NABISY can be provided via the dena Biogasregister in accordance with the criteria matrix.

Requirements for parallel verification in the dena Biogasregister

The following points must be observed to ensure that parallel verification is documented in a comprehensible manner:

Audit report:

• The auditor or assessor who carries out the audit of the biomethane quantity as part of the BAD must explicitly note the parallel verification in the audit report.
• This entry serves as proof that the biomethane quantities are recorded simultaneously in both systems without any discrepancies.

Prohibition of double marketing:

• Parallel verification does not mean that biomethane quantities may be used simultaneously in different marketing paths. If the verification is rebooked or retired in one system, it must also be rebooked/retired in the other system.  

For various reasons, it may occur that a contractually agreed delivery cannot be made after all, or only partially, and replacement quantities must be procured. Especially if the delivery period has already begun, problems may arise with the mass balancing of the quantities. An interpretation aid on this topic can be found here:

Design aid for mass balancing for replacement purchases