I had something like this happen.

The buyer from hungary filed a item not received claim and they took my money from my paypal account (it has been negative ever since).

5 months later out of curiosity I sent a message to the buyer and he replied that he did received. But since the case was closed in Ebay there is no way for me to forward the email I received from him to get my account back up in good standing...

I was sent to collections and filed a debt verification letter which they didnt reply correctly and havent responded to it and two years later still does not show on my credit report.

If it ever does I will just file the debt verification letter again and ask for small claims court.