Two major standards, ISO/DIS 14060 and the SBTi Corporate Net-Zero Standard V2, have converged on requiring additionality and integrity as prerequisites for environmental attribute certificates, establishing guardrails such as subordination to direct emissions cuts, type/volume/region matching, and separate accounting. With buyers and producer coalitions already setting stricter standards, independent verification of carbon intensity and catalytic impact has become essential for market access, shifting integrity from a competitive advantage to a mandatory entry requirement.