When you come across an unofficial source under the guise of an established informational news agency of some kind, this is what we call "Imposter Content". Essentially, imposter content involves made-up sources impersonating credible sources. Imposter content oftentimes takes the form of identity theft, where a website, or the individuals that post on said website, pose as credible sources under the actual names of already established information sources.
An example of imposter content is the infamous case of fraudulent Washington Post newspapers being handed out in the streets in Washington D.C back in January 2019. These newspapers had false information claiming that President Donald Trump had resigned from office. The newspapers were made to look and feel exactly like a genuine Washing Post newspaper; the text, pictures, etc. were done professionally to copy original newspaper formatting (WPSU - Penn State Public Media).
Another example of imposter content is from back in 2018, when a fake account was created on Facebook which copied the profile of official news network "The Verge". The imposter account left a post in reply to an official The Verge Facebook post to appear as the same account. The comment suggested users donate to their Bitcoin address 0.2 BTC to test their account for a giveaway, promising 2 BTC immediately in return. A case of not just imposter content, but a scam too, as the 2 BTC return was never given (De Facto, 2019).
When browsing information provided by news networks, individuals, and just about any other form of news entity, be diligent in checking reliability of the content and authenticity of the authors. Imposter content can be seemingly official and right at first, but analysis of other similar sources can falsify information. Stopping imposter content is difficult, and so paying close attention to community support and posts by genuine news outlets (such as on Facebook, Twitter, or Instagram) allows for avoidance of current imposter news and information. This is important for making sure the information you've gathered is likely to be true and reliable (Young African Leaders Initiative, 2018).