yep i get em too.they usually say from "ebay inc."this right there is your sign .also if it does list an item number check it out 99.99% of the time it will not exist.and i'll agree with engatwork if you do open one by mistake quick change your password.thing to remember is if you have bid on an item or not.i got one about 3 weeks ago saying i still had not paid for an item.problem was i hadn't bid on anything in about 6 months so i figured it was bogus to begin with.