Call Security
A Vendor Callback Verification Workflow for Incoming Calls
Verify unexpected vendor callback requests through approved records before sharing account details or transferring the caller.
Treat the incoming claim as unverified
An unexpected caller may know a vendor name, invoice amount, employee title, or recent project. Those details alone do not establish identity. The assistant should listen, capture the stated purpose, and avoid confirming account facts that the caller supplied.
Use a neutral explanation that the business verifies sensitive vendor requests through its own records. A consistent rule protects legitimate vendors as well as the business because it prevents an impostor from exploiting urgency or familiarity.
Call back through an approved channel
Find the vendor contact in the procurement system, signed agreement, or controlled directory. Do not use a phone number or link provided during the unexpected call. If the approved record is missing or outdated, route the request to the vendor owner for review.
The callback should confirm the organization, named contact, and business purpose before any transfer or disclosure. Payment changes, banking instructions, credentials, and contract amendments always remain with authorized staff, even when basic identity checks pass.
Document the verification outcome
Record the source used for the callback, the person reached, the time, and the next owner. Avoid storing authentication answers or unnecessary financial details in call notes. If verification fails, mark the request for security review and do not tell the original caller which part of the check failed.
Periodically test the approved directory and remove former contacts. Track patterns such as repeated urgent invoice requests or calls aimed at several employees. The workflow succeeds when routine vendor communication continues while sensitive changes remain behind an independent verification boundary.