How's that a "penalty"? It's more of a proper invoice for the costs that arised?! I had a situation twice were I was late. Didn't have to pay, but would have w

How's that a "penalty"? It's more of a proper invoice for the costs that arised?! I had a situation twice were I was late. Didn't have to pay, but would have without hesitation. Doesn't matter the cause.