How do you fine someone without knowing the identity? What do you do if they don't pay the fine? What if they continue doing what they are no longer allowed to

How do you fine someone without knowing the identity? What do you do if they don't pay the fine? What if they continue doing what they are no longer allowed to do without the license? There are certainly cases where you can punish someone without any cooperation on their side - like no longer giving them some benefits or freezing a bank account - but those scenarios are really far from covering all possible scenarios and you still have to determine the identity at the very least.