For months now, there has been a tumult among users whose complaints range from the spread of counterfeit messages to the use of the network to manipulate elections and the harvesting of 50 million Facebook data by Cambridge Analytica.
Manipulated photos and videos are another growing problem in social media.
The fact-finding process began in France on Wednesday with the support of the AFP news agency and will soon be extended to other countries and partners, said Tessa Lyons, product manager on Facebook, in a briefing with reporters.
Lyons did not say what criteria Facebook or AFP would use to rate photos and videos or how much a photo could be edited or edited before it was considered a fake. The project is part of "efforts to fight false news around elections," she said.
A representative of AFP could not be reached immediately for a comment.
Facebook's shares closed 4.4 percent at $ 1
Facebook has tried to curb the spread of fake messages. It has used third-party fact checkers to identify them and then given such stories less prominently in the Facebook News Feed when people share links to them.
In January, chief executive Mark Zuckerberg said Facebook would prioritize "trusted" news. By means of member surveys, high-quality outlets were identified.
Samidh Chakrabarti, another Facebook product manager, said in the briefing that the company had "proactively" searched for electoral disinformation instead of waiting for and helping users' reports
Alex Stamos, Facebook's chief security officer, said in the briefing that the company was not only concerned with false facts, but also other types of counterfeiting.
He said Facebook wants to reduce "false audiences". "which he described as" tricks "to artificially expand the perception of support for a particular message, as well as" false narratives, "such as headlines and language, that" exploit differences of opinion. "