The phrase "unverified sources" refers to information or statements that have not been confirmed or proven as true. It means that there is no reliable evidence or fact-checking to support or confirm the accuracy of the information. Full definition
According to some lovely unverified sources, several retailers (including Gamestop) are removing the basic 8 GB Wii U edition from their shelves ahead of Nintendo's E3 presentation. (dealspwn.com)
Several unverified sources placed holiday season 2011 as a potential release window - and if Hitman V is already in production, it's possible that this might come to fruition after all. (dealspwn.com)
Following weeks of leaks from LG and unverified sources alike, the LG G6 is finally official for all to see and experience. (androidcentral.com)