We've been contacted by a well established foundry, accusing us of copying one of their typefaces and demanding that we take it down or legal action will be pursued. For a fact, I can say that it is not a copy in any sense. Like a lot of neo-grotesk sans, it shares similarities, but that is as far as it goes.
What I'm worried about is the unknown. So does anybody know the extent of how serious the legal action can get? Or has anyone experienced this kind of intimidation before? How would people respond/react to this?