Despite the name, Goatskin in Kingdom Come: Deliverance 2 isn't a literal goatskin. He's a crucial character you must locate during the "Into the Underworld" main quest in Kuttenberg. Katherine will direct you to the inn, but finding him involves a bit of detective work. Here's a simpler approach:
Goatskin hides in a barn above the Black Horse tavern. Access the barn located behind the tailor's shop and climb the ladder. Remember, this is a private area, so stealth is key.
Once upstairs, drop down into the courtyard, climb onto the carriage, and enter the adjacent barn through the window. Climb to the top floor; Goatskin will be there. This method only works during the daytime; he changes locations at night.
Before interacting with Goatskin, save your game. Successful dialogue checks are necessary for smooth quest progression; otherwise, you'll face a hefty 150 groschen bribe (increasing to 500 groschen upon failure).
This concludes our guide to finding Goatskin. For more Kingdom Come: Deliverance 2 tips, including romance options and optimal perk selections, check out The Escapist.