I'm not very familiar with formal opinions being issued in connection with a QOF, but it sounds like the result of a law firm doing due diligence on a fund an issuing a due-diligence opinion. As QOFs are brand new, I don't imagine there is much history on this topic. If I am understanding the assumption correctly, then the main issue in question is whether or not the investment is viable or safe, which is not my area of practice expertise. I am a tax CPA who can opine on the tax compliance, implications, etc. So you would have to elaborate further on who is issuing the opinion and what type of opinion is being issued (legal, tax, etc.). But if it's what I suspect and it's legal, then it's nothing more than due diligence. Having said that, due diligence is extremely important for any substantial investment. Otherwise, how does one know if there investment is in good (ethical) hands?