Ordermentum accepts AMEX for venues to transact their payments.
When an AMEX transaction first appears on the bank statement/line in a "pending" state it will show as ORDERMENTUM
Once the payment has been completed the description will be updated to reference the supplier and invoice number. The completed reference will appear as ZAI*SUPPLIER - INVOICE NUMBER SYDNEY
Due to a character limit on the description, only partial invoice numbers may appear for some suppliers.