A compliance obligation is created by a law or regulation and is met through the mechanisms that rule permits. A voluntary carbon credit is issued under a separate voluntary programme. Similar climate terminology does not make the instruments interchangeable.
FuelEU Maritime calculates a compliance balance for each in-scope ship and provides defined flexibility through banking, borrowing, and pooling, subject to the regulation's conditions. The EU ETS requires shipping companies to surrender EU allowances for the share of verified emissions covered by the scheme. A voluntary carbon credit is not a FuelEU compliance balance or an EU allowance.
A company may use voluntary credits for a separate voluntary claim if the chosen standard allows it. That use does not change the ship's FuelEU calculation or remove its EU ETS surrender obligation. Reports should identify the programme, vintage, retirement record, claim boundary, and whether the credit is presented separately from gross emissions and regulatory compliance.
Fuel buyers should identify the obligation first, then check the accepted instrument, responsible entity, reporting period, verifier, deadline, and evidence. This avoids treating a fuel declaration, an allowance, a compliance balance, and a voluntary credit as if they were the same asset.
The current Verdaxis marketplace lists physical marine-fuel products, not voluntary carbon credits. Supplier certification and CI fields are declarations used in the trading workflow. They do not by themselves establish that a buyer has met FuelEU Maritime, EU ETS, or another legal obligation.