What are the risks of buying over second hand endownment policies?

For the returns risk, just remember the non-gauranteed portion have a small risk of giving $0, and a slightly higher probability of giving less than stated, due to market (which is the same as any endowent plants). But since its a pre-loved plan, you can surrender anytime if the returns are not fantastic to you.

For the legal risk, its stated in my article.

https://www.linkedin.com/pulse/have-your-financ...

For the risk of insurer belly up, it can't be easily found because you wouldn't know whether the person has reached the SDIC limit for his other policies.

P.S: I am a self-employed broker so if you wish to, you may engage my service.