Verification & data quality
Why 35-40% of your "verified" leads actually aren't
Because "verified" almost never means 100% effectiveness. Real email and phone verification effectiveness runs around 60-65% — meaning between 35% and 40% of verification attempts fail, and those contacts should never reach your inbox.
Because "verified" almost never means 100% effectiveness. Real email and phone verification effectiveness runs around 60-65% — meaning between 35% and 40% of verification attempts fail, and those contacts should never reach your inbox.
What's actually happening with that 35-40%?
It isn't that the provider is lying about verification — real verification always has a failure rate. Emails that no longer exist, disconnected phones, numbers that changed hands. No verification process, however good, reaches 100%.
The problem isn't that this failure rate exists — it's what the provider does with it. If the provider discards those contacts and only delivers what passed verification, the buyer never sees the problem. If the provider includes them anyway to inflate list volume, the buyer inherits that 35-40% of dead contacts.
How do you know which one is happening?
The most direct question to ask a provider is: what percentage of attempted leads end up discarded, and is that discard already reflected in the price you're charging me?
Why doesn't 100% effectiveness exist?
Because contact data changes constantly: people change jobs, companies switch phone providers, corporate emails get deactivated when someone leaves. Any provider promising 100% effectiveness is promising something the reality of data simply doesn't allow.
Frequently asked questions
Is 60-65% effectiveness good or bad?
It's the realistic range for one-by-one verification of combined email and phone. Any figure close to 100% should raise more questions, not more confidence.
Do I pay for leads that fail verification?
No — only leads that are actually delivered, already verified, are charged.
EDITORIAL NOTE
This guide reflects Qurada’s operating methodology and the information available at its update date. Scope, source availability, and verification results vary by market and workflow.
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