Social networks have surpassed their intermediary role and become gatekeepers of online content and traffic. This transformation
has favored the spread of information disorders. The situation is especially alarming in Spain, where 57% of
Spaniards have at some moment believed false news. Since 2016, First Draft has promoted several collaborative verification
projects that brought together newsrooms to fact-check false, misleading and confusing claims circulating online during
presidential elections in several countries. The main objective of this article is to study the collaboration forged between
newsrooms in Spain in order to debunk disinformation contents in 2019 under the name of Comprobado (Verified) and
the impact of this initiative. Applying a methodological approach based on non-participant observation, interviews, content
analysis of reports, scientific articles, books and media archives, we examine the internal uses of this platform, how
journalists verified public discourse, the strategies and internal agreements implemented, and the degree of participation
of the 16 media involved. Results show that only half of the initiatives begun were transformed into published reports, and
the media impact achieved was limited. Finally, we note that the principal reasons for the frustration of the project were its
improvised implementation, due to the date of the election being brought forward, and the scant culture of collaboration
in the sector. In Spain at least, cross-media alliances are still an exception.
