Thank you for reporting! I have added this websites to the phishing web-sites list in the announcement thread and also reported them to Google. Some of this websites generates Letter of Guarantee very similar to the original one, but it has the same address you should send your coins to and it is stated as the target address. Always check the Letter of Guarantee before sending money. You can use any available public tool for bitcoin message verification. I.e. this one: https://tools.clarkmoody.com/verify-message/