The phrase "unreliable sources" refers to information or people that cannot be trusted because they may provide incorrect or false information. Full definition
Students often have a poor work history combined with very unreliable sources of future earnings. (growingfamilybenefits.com)
Why do we get worked up about rumours that a player is joining us when it's coming from unreliable sources? (justarsenal.com)
We always find reliable and reputable sources to write your paper and will never depend on unreliable sources to write your order. (traditionessaysonline.com)