Folklore was written and recorded in secrecy. Swift, her boyfriend, family, management team, Antonoff, and Dessner were aware of the album's creation; she did not disclose the news or play the album to her friends like she did with her previous works. Near the end of Folklore's recording process, Dessner reached out to his regular collaborators, including the National bandmates, to provide instrumentation remotely. Bryce orchestrated several songs, while Bryan Devendorf performed the drums in "Seven". Dessner kept Swift's involvement confidential from his family and colleagues until announcement. While filming the "Cardigan" music video, Swift wore an earpiece and lip-synced to the song to prevent it from leaking. Dessner stated that Swift's label, Republic Records, was unaware of the album until hours before its launch.
