---
title: "What is Callback verification? Definition"
description: "Callback verification is confirming a payment instruction or bank-detail change by phoning the requester on a number you already had on file - never..."
url: https://realpayee.com/glossary/callback-verification
canonical: https://realpayee.com/glossary/callback-verification
date_published: 2026-10-05
date_modified: 2026-10-05
author: RealPayee
---

# Callback verification

> Callback verification is confirming a payment instruction or bank-detail change by phoning the requester on a number you already had on file - never one supplied in the request. The contact should read the new details back to you, and the call should be documented.

_Published 2026-10-05 · Updated 2026-10-05 · By RealPayee_

## Related terms

- [Out-of-band verification](https://realpayee.com/glossary/out-of-band-verification): Out-of-band verification is confirming a request through a separate channel and contact details the requester did not provide - for example, calling a vendor's known number after an email request.
- [Vendor verification](https://realpayee.com/glossary/vendor-verification): Vendor verification is confirming that a supplier is legitimate and that the bank account you pay belongs to it - at onboarding and whenever its payment details change.
- [Voice cloning](https://realpayee.com/glossary/voice-cloning): Voice cloning uses AI to synthesize speech in a specific person's voice from samples of their recordings.

## Why it matters for finance teams

Most payment fraud reaches AP as a request that looks legitimate. Understanding callback verification helps your team spot it and apply the right control: verify bank-detail changes and large payment requests with the real person, out-of-band, before money moves. Our free [bank-change policy template](https://realpayee.com/templates/vendor-bank-change-policy) puts that into a written rule.

Full glossary: https://realpayee.com/glossary · All terms as JSON Lines: https://realpayee.com/feeds/glossary.jsonl

## 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)
- [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. (markdown: https://realpayee.com/templates/vendor-bank-change-policy.md)
- [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. (markdown: https://realpayee.com/answers/is-a-callback-enough-to-stop-vendor-fraud.md)
- [Manual callback verification vs RealPayee](https://realpayee.com/alternatives/manual-callback-verification) - Manual callback verification compared with RealPayee: what a callback catches, where it breaks (wrong numbers, skipped steps, voice cloning) and how to make it stronger. (markdown: https://realpayee.com/alternatives/manual-callback-verification.md)

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