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Vendor diligence

How to check whether a lead vendor is legitimate

Most vendors worth avoiding are real companies. That is what makes this hard.

Alex Makowski · Updated 14 September 2026 · 4 min read

The short answer

Start with the checks that need no cooperation: domain age, an entity registered under the name on the invoice, a named human, a phone answered in business hours, and terms published rather than quoted. Then sort the vendor’s claims into those that could be proved wrong and those nobody can prove either way. No vendor can prove an exclusive lead reached nobody else, Infinite Bookings included, so treat exclusivity as a written commitment rather than evidence.

Legitimate is doing two jobs in that question. One is whether the company exists and will deliver anything after you pay. The other is whether what arrives is what you were sold. The first is rare and takes ten minutes to rule out; the second is common and where the money goes.

One more thing gets called a bad vendor and is not: leads exactly as described, bought by a floor that dials them hours later. No vendor solves that one.

The ten minutes that cost nothing

CheckHowWhat should stop you
Domain ageAny WHOIS lookupWeeks old, beside a claim of years
A registered entitySecretary of State search, billing stateNo entity, or a name that does not match
A named humanThe site, then LinkedInNobody’s name on any page
A phone that answersCall in business hours, before you enquireVoicemail only, or a new number each time
Terms publishedPricing, criteria, replacements, on the siteQuoted privately, never written down

Passing all five is a floor, not a recommendation, and one row needs a caveat. A funding application page under a different consumer-facing brand is normal, ours included: a merchant applying for funding should not be reading a page about buying leads. Where that tips into the reseller pattern is spotting a reseller’s subject, and its reading is the one to follow: the ad library, the disclosure name and arrival times all belong there.

Which claims you can check, and which nobody can

The claimCheckableHow
The phone is verified by a codeYesDial the records and count what connects
This is the consent disclosureYesThe text, plus a certificate for one record
These are the qualification gatesAfter the factCount the records that miss one
An exclusive lead goes to one buyerNoThe proof would have to be an absence

That last row includes us. A delivery log proves a lead reached you; it cannot prove the record reached nobody else, because that proof would be an absence. Ask what has a checkable answer instead: which products the vendor sells — exclusive, shared, aged — and what the agreement says about who else receives each one. A written commitment is something you can hold. An offer of proof is not.

Red flags, and the ones that only look like flags

Thirteen are already written out one at a time in the thirteen questions, each with our direct answer to set a vendor’s against. Three more are about the transaction rather than the product.

  • A price far below the band. A $20 quote for an exclusive, verified lead is not a discount, it is a different product wearing the label.
  • Urgency attached to an irreversible payment method. A wire today at a price that expires tonight works because a wire has no recourse; the irreversibility is the tell, not the price.
  • An invoice from a name you could not find. If the entity billing you is not the one you checked, you do not know who your claim would be against.

Run this on us

Every check here works on us, and several answers are not flattering: no free trial, no sample batch, $60 per exclusive lead, a benchmark of two to four funded per fifty exclusive leads (4–8%) rather than our best, and no scrubbing against DNC or litigator lists. In our favour, nothing is prepared for you — your leads come off the same week’s generation as everybody else’s, unsorted and unpicked. What we give away is a file of public UCC filings, which is not a sample of the paid leads.

Questions.

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— Alex