I've bought software from a vendor for $299. It turned out that the vendor had no right to sell this software - he essentially bought a single license from the original developer, setup a website with the name very close to that of the original developer and started selling that license over and over again.
Obviously when I asked for some bugs to be fixed, he completely cut off contact, thus the software is nearly useless to me. A bit later, I found out about the deception from the original developer, who sells the software for $999.
The original developer wants to go after the impostor in courts (they are both in Ukraine, if either one of them is to be believed). So he offered me a free license of his software, if I provide him with a notarized letter stating that I was defrauded by the impostor. I am in US.
Does it make sense for me to go for it? What are the downsides? Should I go for it?