I’m trying to help find a fic for a friend. It sounds familiar, but I cannot remember the title. This is what was provided to me:
“I'm looking for a sess/kag fanfiction where everybody has the first words to their soulmate written on their wrists. Sess and kag don't have any, so they think they're sol, but it turns out when they first meet, they shake hands and don't say a word.”
Does anyone know what story this might be?

You’re probably looking for “Wordless”. It was posted a while back and was in the process of being rewritten, but the author took a hiatus from the fandom, so it’s been removed. I think there were five or so chapters originally?