Send a copy to whom? The two parties already know the situation, they just disagree.
And remember, there are two steps: (1) have a contract, and (2) fulfill the contract. (this assumes that we are talking about a service....it's more cut and dry when talking about goods - then it's just a matter of agreeing on a price, and verifying that the correct goods delivered, within the terms that were in force).
Example: You hire me to write an app, and we sign a contract. I write one, but it's buggy, hard to maintain, etc. Gets 1.9 star reviews on app stores. People on iHub ridicule it, say the buttons don't line up, say the calculations don't make any sense.
From my perspective, I wrote the app for you, so I send you a bill.
From your perspective, I didn't fulfill the contract because you expected a top-tier, commercially viable app, and I delivered a crappy app. So you don't pay the bill. The conversations can go a hundred ways from there, but in the end we don't see eye to eye.
That's why you need a judge.
