[Neus]

What Chaos said. This goes doubly for donation items. If you deal with someone you don't know too well, my advice is to screenshot the whole ordeal so you have some level of proof if something goes awry.

I -can- verify your claims by looking at the person's savefile and trade logs, quite easily in fact. Just make sure you know who you're dealing with, IE, verify with them what their key is. If you don't have that much, helping you becomes a little harder. But ultimately, Mega gives some decent advice in that you should try to only deal with people you trust.