I have no idea how something like this can even happen. In a company of that size it should be actually impossible for a transaction like this to occur without clearly documented processes to ingest, review, authorise and pay transactions.<p>I have clients where anything over even quite a low set limit (say €10k) requires multi-party authorisation - and it's very common for the person entering payments to be unable to authorise payments. That's just good practice.<p>A payment should not be able to be queued without a PO number. If the payee is new, the bank details need to be verified by phone. Once approved as a destination account, that payee is set up in banking, and authorised by a finance clerk and someone more senior. At the point a payment is requested the PO and other details should be double checked against what is in the system. If there's a match, then the payment can be queued for authorisation. The person entering payments and the people approving payments should be entirely different - and it should be people, not a single person. When payments are entered, the payments should be reviewed by first authorisation - a finance manager, for example - and once that authorisation is conducted, depending on payment limits, another authorisation or authorisations will be carried out.