While processing year end, our AP clerk found that one of our vendors changed name and tax id number around mid-year.  She was not aware of this, therefore several invoices were posted and paid to the incorrect vendor account. We figured a fix would be to void the checks and invoices, then repost them all under the correct vendor account.  However, she cannot void the checks since they have already been reconciled.  Does anyone know of a way to correct this?  We're trying to make sure our 1099s are accurate and this will definitely be a problem.