Automate Invoice Vouching is a Trelium web tool for checking a supplier invoice against a purchase order, sales order, or order acknowledgement. Users upload both documents, and the tool pairs line items, compares quantities and prices against configurable tolerances, checks charges, dates, payment terms, and duplicate invoices, then reports exceptions with the compared values and differences. Unclear or low-confidence information is flagged for human review rather than guessed. Trelium also describes an agent workflow that can retrieve invoices, perform matching, and route exceptions.