I found the duplicate. INV-2221 from Globex Supplies ($7,925.00) has the same amount, PO, and line items as INV-2190 paid on Sep 18.

• INV-2190 was paid by ACH on Sep 18 (trace 0918-4471).
• INV-2221 arrived Oct 5 with a new number but the same PO-1204.
• I put INV-2221 on hold and drafted a note to the vendor asking them to void it.

Yes. The ACH for INV-2190 settled on Sep 19, trace 0918-4471, from the operating account. Globex has not issued a credit memo, so INV-2221 is still open on their side.

Draft to Globex:

Subject: Duplicate invoice INV-2221 (PO-1204)

Hi Tomas,

INV-2221 for $7,925.00 duplicates INV-2190, which we paid by ACH on Sep 18 (trace 0918-4471). Please void INV-2221 and confirm by reply so we can close it on our side.

Thanks, Accounts Payable

Sent to ar@globex.example and copied to AP. The invoice stays on hold in the meantime, so the Oct 27 run will skip it.