Invoices and Affidavits. 1.1 Invoices must adequately describe the goods or services provided to County and include all required backup (i.e. reimbursable expenses, mileage log, timesheets, receipts detailing expenses incurred etc.) that is in a form acceptable to the Xxxxxxxxxx County Auditor. Invoices that do not adequately describe the goods or services provided to County or contain backup that is satisfactory to the Xxxxxxxxxx County Auditor will be returned to vendor for revisions and the provision above relating to invoice errors resolved in favor of the County shall control as to the required actions of vendor and when such invoice must be paid by the County.