How do I know the new trees have really been planted, and that they haven't sold them dozens of times over? How do I know the trees will survive and actually p

How do I know the new trees have really been planted, and that they haven't sold them dozens of times over? How do I know the trees will survive and actually pull carbon out of the atmosphere, rather than dying in a year or two? Which they might do, if they're planted on unsuitable but cheap land. How do I know that, in 20 years time, they won't have gone out of business and sold the land on to a logging company who turns it all into firewood? There's also a wealth of scammers who'll do things like "buy rainforest to protect it from development" when no development was going to happen anyway.