--- title: "Answers: vendor payment fraud questions finance teams ask" description: "Short, direct answers to the questions AP managers, controllers and CFOs ask about vendor bank change scams, callbacks, BEC liability, Positive Pay, deepfake CFO scams and insurance." url: https://realpayee.com/answers canonical: https://realpayee.com/answers date_published: 2026-10-05 date_modified: 2026-10-05 author: RealPayee --- # Answers to payment fraud questions > These pages answer the questions finance teams ask most about payment fraud, each in the first paragraph. They cover verifying vendor bank changes, whether callbacks are enough, BEC liability, Positive Pay, deepfake CFO scams, insurance and out-of-band verification. Each links to deeper guides, sources and our free policy template. _Published 2026-10-05 · Updated 2026-10-05 · By RealPayee_ ## Vendor verification - [How do I verify a vendor bank account change?](https://realpayee.com/answers/how-to-verify-a-vendor-bank-account-change): A step-by-step way to verify a vendor bank account change before you pay: freeze the change, confirm out-of-band with a known contact, check the account, get a second approval and keep a record. - [Is a callback enough to stop vendor fraud?](https://realpayee.com/answers/is-a-callback-enough-to-stop-vendor-fraud): When a phone callback stops vendor fraud, when it fails (wrong numbers, skipped calls, voice cloning) and what to add so the control holds. ## Legal and insurance - [Who is liable for business email compromise losses?](https://realpayee.com/answers/who-is-liable-for-business-email-compromise-losses): General information on who bears a business email compromise loss: the payer, the vendor, the bank or an insurer, and the factors that usually decide it. Not legal advice. - [Do cyber insurance policies cover social engineering fraud?](https://realpayee.com/answers/do-cyber-insurance-policies-cover-social-engineering-fraud): General information on whether cyber or crime insurance covers social engineering fraud such as fake vendor bank changes, and what insurers commonly ask for. Not insurance advice. ## Vendor fraud - [What is a vendor bank change request scam?](https://realpayee.com/answers/what-is-a-vendor-bank-change-request-scam): How the vendor bank change request scam works, why it succeeds, warning signs and the controls that stop it. ## AP controls - [How do accounts payable teams detect fake invoices?](https://realpayee.com/answers/how-do-accounts-payable-teams-detect-fake-invoices): Practical checks AP teams use to detect fake invoices: three-way matching, vendor master controls, duplicate checks, anomaly review and verifying bank details. - [What should an AP vendor change policy include?](https://realpayee.com/answers/what-should-an-ap-vendor-change-policy-include): The elements of a vendor master data change policy for accounts payable: scope, verification steps, approvals, evidence, exceptions and review. ## Bank controls - [Does positive pay stop vendor impersonation?](https://realpayee.com/answers/does-positive-pay-stop-vendor-impersonation): Why Positive Pay does not stop vendor impersonation fraud, what it does stop, and which control covers the gap. ## Executive impersonation - [How do deepfake CFO scams work?](https://realpayee.com/answers/how-do-deepfake-cfo-scams-work): How deepfake CFO and CEO scams work, from cloned voice messages to fake video calls, and the verification steps that stop them. ## Verification methods - [What is out-of-band verification?](https://realpayee.com/answers/what-is-out-of-band-verification): What out-of-band verification means for payments and vendor changes, examples, why it beats replying to an email, and its limits. ## Related - [Vendor verification: how to verify vendor bank details before you pay](https://realpayee.com/vendor-verification) - A practical guide to vendor verification for finance teams: how to confirm vendor bank-detail changes, run callbacks, and prevent vendor impersonation fraud. (markdown: https://realpayee.com/vendor-verification.md) - [Payment fraud glossary](https://realpayee.com/glossary) - Plain-English definitions of payment fraud and verification terms: BEC, vendor impersonation, callback verification, positive pay and more. (markdown: https://realpayee.com/glossary.md) - [Payment fraud statistics 2026](https://realpayee.com/payment-fraud-statistics) - Verified payment fraud statistics for 2026: FBI IC3 business email compromise losses ($3.0B in 2025), AFP survey data on payments fraud, BEC and vendor imposter fraud. Free CSV, free to cite. (markdown: https://realpayee.com/payment-fraud-statistics.md) - [Free vendor bank-change verification policy template](https://realpayee.com/templates/vendor-bank-change-policy) - A free, copy-ready vendor bank-detail change and callback verification policy template plus checklist for AP teams. 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