https://phys.org/news/2018-11-palm-oil-companies-commitments-lacking.html

Furthermore, only 26 companies expect all their suppliers to also match their commitments, and just 24 provide any evidence of how they monitor forest cover across their supply chain to ensure that no deforestation is taking place. This means companies can "meet" their zero-deforestation commitments while still contributing to forest loss on the ground.

Currently, SPOTT assesses companies that manage nearly nine million hectares—an area roughly the size of Portugal. With 2017 the second worst year on record for tropical tree cover loss—seeing 15.8 million hectares disappear—and forests playing a key role in climate change mitigation, palm oil companies must reinforce their commitments to tackling deforestation, providing detailed information on the areas monitored, the timeframe for tracking forest cover, and methods used (e.g. patrols, satellite monitoring).