The Backchannel Reference Check
Vet any vendor's promised results by calling their past clients before you sign, not after.
- Difficulty
- Easy
- Time to result
- ~days to results
- Steps
- 5
- Confidence
- 62%
Wing Lam learned, after being burned by people who claimed results they never delivered, that trustworthiness has to be verified before the transaction, not assumed from the pitch. The mechanism is simple: any vendor claiming a specific outcome (an ROI figure, a completion timeline, a quality standard) should be asked to produce past clients who can confirm it independently. The buyer then contacts those references directly and asks pointed questions — not "were you happy" but "what did you actually get, and did they over-deliver, meet, or under-deliver on what was promised." This surfaces the gap between a vendor's sales pitch and their actual track record before the buyer is financially or contractually committed. The method works because vendors control the narrative in a pitch but lose that control once a buyer talks to someone with no stake in the sale.
Origin
Wing Lam described being taken at face value by people who claimed to be trustworthy and to deliver a specific service or outcome, only to discover later they were "the worst of the worst." The hard lesson pushed him toward always talking to a vendor's past clients before committing, rather than trusting the pitch.
Core principles
- 01Never take a vendor's claimed results at face value.
- 02Past client experience predicts future performance better than a pitch does.
- 03Ask the specific metric, then verify it with someone who isn't the vendor.
- 04A vendor who genuinely over-delivers wants your referral more than your next payment.
How to run it
- 1
Identify the specific claim
Pin down the exact outcome the vendor is promising, whether it's an ROI figure, a delivery date, or a quality standard, rather than accepting vague reassurance.
Pro tip Write the claim down in the same words the vendor used so it can be checked later.
- 2
Request 2-3 past clients
Ask the vendor directly for references from people they've done similar work for recently.
Watch out A vendor who resists giving references at all is itself a red flag.
- 3
Contact references independently
Reach out to the references yourself, without the vendor present or copied, so answers aren't filtered.
- 4
Ask for the actual number, not the sentiment
Instead of asking if they were satisfied, ask what specific result they got and whether the vendor over-delivered, matched, or under-delivered on the original promise.
Pro tip People are far more candid about numbers than about general satisfaction.
- 5
Decide based on the pattern, not one data point
If multiple references confirm consistent over-delivery, proceed with confidence; if the pattern is inconsistent or under-delivery, treat the vendor's original pitch as unreliable.
In the wild
A small business owner is pitched by an ad agency promising a specific return on every dollar spent. Instead of signing immediately, the owner asks for two clients the agency has run similar campaigns for, then calls both directly and asks what ROI they actually saw, and whether the agency hit, beat, or missed its own promise.
→ One reference confirms the agency consistently beats its promised numbers; the owner signs with confidence instead of gambling on the pitch alone.
Common mistakes
Trusting the pitch over the track record
Taking a vendor's claimed results at face value skips the one check that actually predicts performance: what past clients experienced.
Asking references vague satisfaction questions
Asking "were you happy" instead of "what number did you actually get" lets weak performance hide behind politeness.
Is it for you?
Best for
Owners hiring a mechanic, plumber, electrician, ad agency, or event promoter for the first time.
Not ideal for
Vendors you already have a multi-year track record with.
From the transcript
“You take it at face. So, what you learn from that is referrals. So anymore these days, and I tell everybody out there, if you're…”
“I like to work with guys that overdeliver, right? Because then at the end of the day, they always want to make sure you're happy.”
From the episode
Wahoo's Founder on AI, Failure, and 38 Years of Grind