We closed on our house today and deposited the check. The documents from the title company have closing costs as a single line item with no itemization. They called us about 6 hours later claiming that they overpaid us by $15k due to forgetting to tack on a closing cost credit we were giving the buyer and they want us to write them a check for the difference.How do we verify that they did indeed give us the wrong amount since nothing on our closing documents was fully itemized? Is it wrong to refuse to write them a check until the check they gave us clears? Any advice?Edit: we also didn’t receive a HUD-1 / closing disclosure before settlement. Is that normal as a seller?