How to Verify B2B Contacts Without Overclaiming
Verification is a set of checks with known limits. Documenting those limits is more useful than an accuracy percentage.
6 min read · Updated 2026-01-15
Role verification comes before email verification
A deliverable email for the wrong role is still a wasted touch. Confirm the person still holds the relevant responsibility first.
Syntax, domain, mailbox
Email checks operate at different levels of certainty. Treat them as distinct signals rather than a single pass or fail.
Record what was checked
Verification status should describe which checks ran, not imply a guarantee. That is what makes it usable in an audit.
Key takeaways
- Verification confirms specific checks, not a person's future behaviour.
- State what was checked, how, and when — an accuracy percentage on its own means little.
- Role verification matters more than email verification for campaign outcomes.
The checks worth running, in order
Company still active, domain resolving and in use, role still held at that company, contact format valid and deliverable. Running them in that order stops effort being spent verifying an email address at a company that closed last year.
Each check has a different shelf life. A domain check holds for months; a role check can be wrong within weeks in a fast-moving organisation.
Why we publish limits rather than a single score
A single accuracy figure invites the reader to assume everything unstated was also checked. It rarely was.
We deliver a status per record with the date and the method, so a marketing lead can see exactly which part of the file is safe for a high-volume send and which part needs a human look first.
Practitioner note: any supplier quoting a fixed accuracy percentage across an entire file is describing a sample, not your records.