Prepare each call: confirm the documentation is complete and legible (tax form, official bank document or signed letterhead, beneficiary, account and routing details, contact name and title), compare the legal name across the invoice, W-8 / W-9, bank document and PO or contract, and screen for red flags - urgent changes right before a payment date, unexpected change of bank country, look-alike email domains, pressure or requests for confidentiality. Only after a PASS - VERIFIED result, send the package to Treasury as "OK to set up" under the subject convention (New / Update Bank Account - [Vendor Legal Name] - [ddmmyyyy]), including tax documentation, the validated bank document, callback confirmation, the name of the ON.energy verifier and of the vendor contact who confirmed, and any resolved exception; retain the full evidence file.