I invested a relatively small amount (luckily). The net returns are poor anyway, but when I tried to make a withdrawal and sent in my documents for ID verification, they came back and said the documents have to be legally notarised and apostille stamped. I didn't even know what that was. No other bank, forex or crypto exchange has ever asked for that. I did some research and turns out the cost was about $AUD1,350, so in my case, it wasn't worth paying out that money on the slight chance that IQ Mining would pay me back anything anyway. I strongly am of the opinion now that the apostille stamp thing is set up to make it difficult for customers to get any payments. If it was all legit they would point that requirement out at the start.