A list with 500 dead phone numbers is worse than a list with 200 validated contacts. Here's what "verified" actually means — and what to ask before you buy any lead list.
The phrase "verified leads" gets used by almost every lead data company. But what does it actually mean? In most cases, very little. A database pulling contact information from public records and calling it "verified" without any active checking is marketing language, not a data quality guarantee.
This guide explains what real verification involves, why it matters for your bottom line, and the three questions to ask any lead provider before you buy.
A phone number in a database may have been accurate when it was scraped or recorded — but people change numbers, businesses move, and listings go stale. An unverified phone number is just a string of digits pulled from a database with no double-check. At LocalLeadsData, every phone number is cross-checked against the business's Google listing before delivery, to catch transcription errors and outdated numbers from stale records. This is not a real-time carrier or line-status lookup — we do not place test calls, and we do not confirm the line type, carrier, or that the number is currently connected.
SMTP (Simple Mail Transfer Protocol) verification connects directly to a mail server and checks whether a specific email address appears to exist and accept messages — without actually sending anything. It is a common email check, although some mail servers do not answer it reliably, so it reduces bounces but cannot guarantee delivery.
An unverified email address might look perfect — formatted correctly, no typos — but bounce immediately because the mailbox was closed months ago. SMTP verification catches this before you send.
For distressed property leads especially, the property address and the owner's mailing address are often different — the owner lives elsewhere and rents the property. Our address data comes directly from Google Maps and public records at the time of your order. We do not independently confirm that an owner still receives mail at a given address.
Sending direct mail to the property address for an absentee owner is one of the most common wholesaling mistakes. It reaches the tenant, not the decision-maker.
There's no reliable industry-wide figure for how many numbers in a typical unverified list are bad (see below), so this is a hypothetical example using a round 30% to illustrate the math — not a measured result from any specific list.
Note: a Google cross-check catches wrong or outdated numbers, but it does not guarantee that every number connects, so real results will vary and the $0.20 figure is a best case.
The math gets worse at scale. If you're buying 10 lists per month and running a cold calling operation, unverified data is costing you hundreds per month in wasted caller time alone — before you factor in the deals you didn't close because you couldn't reach the right person.
Every list delivered through LocalLeadsData goes through a 5-step pipeline before reaching you:
The result: a list where every phone number has been cross-checked against the business's Google listing before it reaches you. We don't pad lists with stale, un-checked records to hit a round number.
Verification matters most when:
It matters less when you're only doing direct mail — a letter to a wrong address just doesn't get delivered. But even then, you're paying per piece mailed, so address accuracy still affects your cost per response.
Any niche. Any US state. Data scraped fresh the day you order. Credits never expire.
See Pricing →Verified leads are contacts where key data points have been actively checked before delivery — not just pulled from a database. At LocalLeadsData, every phone number is cross-checked against the business's Google listing, and every public email is SMTP-checked to confirm it can receive messages. We do not claim to confirm a phone line is currently connected.
There is no single reliable industry-wide number for this. Estimates from different data and CRM vendors range anywhere from under 10% to well over half, depending on how old the list is and where it came from -- we couldn't find one credible, citable source with a definitive figure. What's consistent across all of them is that any list pulled straight from public records without a double-check will include some bad numbers.
Every phone number is cross-checked against the business's Google listing before delivery. Every email, when publicly available, is SMTP-checked. Addresses come from Google Maps and public records at the time of your order. We don't promise email on every lead because not every business or property owner has a public email — but we verify what we include.
SMTP verification connects to a mail server and checks whether a specific email address exists and can receive messages — without sending an email. It's the most reliable way to confirm an email is valid before using it for outreach.
Yes. A smaller list of verified contacts produces more conversations and lower cost per contact than a larger list of unverified data. If you're paying a cold caller $10–$15/hour and 30% of numbers are dead, you're losing 30% of your calling budget to bad data. See LocalLeadsData pricing →