Tech platforms have increasingly viewed community-driven models such as X's Community Notes as an alternative to professional fact-checking. (X pic)WASHINGTON: A crowdsourced verification system used by Elon Musk's X failed to flag a vast majority of false claims related to the US midterm elections - including those promoted by the billionaire - a study said Wednesday.

Community Notes, which allows users to contribute notes that add context or corrections to posts, was introduced by X in late 2022 and the same model is increasingly being adopted by other tech platforms.

But researchers have repeatedly questioned its effectiveness in combating misinformation.

NewsGuard, a US watchdog that rates the credibility of news and information sites, identified dozens of posts on X that advanced false claims related to the elections, including bogus allegations of election fraud.