If the skin is not uploaded (filename, whoever uploaded it) you get a warning message each time you go on track.
Quote from Whiskey :A red message on the chat and an error sound. Pretty hard to miss it when it appears hehe some screenshots might help and BtW what's the Hotkey of Screen Shot in The game?
Quote from awerdas : BtW what's the Hotkey of Screen Shot in The game? CTRL + S. Screen shots get saved in LFS\Data\Shots