Don't ask: "if you come across anyone suitable, send them my way." They will agree, and mean it, and never think of anyone.
Do ask (persona + scene + singular): "You mentioned those cross-border sellers you work alongside — several of them still reconcile accounts by hand. Which one of them complained about it recently? Not a list, one person is enough."
Three parts, all required: one, a persona specific enough to match against ("cross-border sellers", not "anyone who needs it"); two, a scene they personally heard — that's a retrieval cue, not a filter; three, ask for exactly one, because one is a completable task and "some" isn't.
If they say "let me think", don't stop. Offer a second cue: "who was in the room the last time you were all complaining about it?" The name often arrives on the spot.
Once you have the name, remove the last cost too: "I'll write something and send it over — if it looks fine, just forward it."
Mechanism: memory is cue-driven. Being stored (available) and being retrievable right now (accessible) are different things, and what separates them is having the right cue. You think you are testing willingness; you are testing retrieval, and uncued retrieval fails at an absurd rate.
Evidence strength: both are peer-reviewed classics and the direction is solid, but neither was run on sales referrals, so this is mechanism transfer. Don't read "3% → 28%" as a promise that your referrals will multiply tenfold.
First, make them say the result — don't summarise it for them. Ask: "compared with three months ago, what's actually different here?" Their sentence is the raw material for everything that follows. Yours is useless: the person who has to retell it is them.
Second, catch it on the spot: "can I quote that?" Take the smallest permission first, then ask for a person.
Third comes the fill-in-the-blank: "You just said reconciliation used to take two days and now takes half an hour. Who in your circle is still living the two-day version?"
Three trigger moments, all of them right after they've said something good, none of them a separately booked meeting: the call where the first result gets confirmed; any time they spontaneously thank you — the strongest signal and the most commonly wasted; and within 48 hours of them praising you publicly.
The line not to cross: don't ask before there's a result. At that point you aren't asking for a referral, you're asking them to vouch for something unproven — they'll be embarrassed later, and the embarrassment gets charged to you.
Mechanism: "I'll introduce you" is an intention, and the gap between intention and action is systematic, not dishonesty. There are only two ways to narrow it — drive the cost of acting to near zero (previous move), or catch the moment when the trigger conditions happen to be complete (this one). On top of that, making them say the result out loud changes them: the version they voiced firms up their own judgement.
Boundary: this timing logic assumes you actually delivered something observable. In businesses where the value only shows up a year later (insurance, consulting), the window has to be manufactured — periodically put the baseline and the present side by side for them. As the customer-success issue put it: what works goes invisible.
1. Underwrite the worst case: "if it turns out not to be a fit, I'll say so myself and go away — I won't chase him." That one sentence addresses the thing they're actually worried about.
2. Make it reversible: "I'll write something you can forward; if he's not interested, forget it happened, and you don't have to follow up for me." A guarantee downgrades into a message.
3. Let them vouch for their experience, never for your capability: "just say it's been working for you and let him judge" is far lighter than "tell him it's great" — the second is a warranty in your name, the first is sharing an experience.
4. Close the loop, unprompted: after the meeting, tell them how it went, deal or no deal. This is the most skipped step and it decides whether there's ever a second one — people don't mind helping, they mind helping into silence, never learning whether they helped or created a mess.
Mechanism: an introduction lives in social norms — favours, reciprocity, a long relationship. Put a price on it and it switches into market norms, where it's a one-off trade judged on whether the money is worth it. The switch is one-way and hard to reverse, because pricing something also hands over a reason to decline: not worth it.
Evidence strength: both are peer-reviewed classics and the mechanism is solid, but how widely "motivation crowding out" holds is genuinely contested (meta-analyses disagree). Don't take it as a law that paying always backfires — take it as a real risk worth designing around.
1. The score triggers, it doesn't report. Every 9–10 gets contacted by a named person within 48 hours — with the fill-in-the-blank question, not a thank-you note. Past that, the energy is gone.
2. The real payload is the open follow-up. "What was the main reason?" The sentence they write is your next piece of copy, your next case-study headline, and the words they'll use when describing you later. The score is one digit; that sentence is raw material.
3. Never appraise a team on it. Once the number drives rewards, what you receive is a groomed number: hand-picked recipients, a heads-up call before the survey goes out. You get the performance version of whatever you measure.
4. Don't compute it on a small sample. A score built on thirty responses is almost entirely noise, amplified by response bias — the people who fill in surveys skew to the extremes. With few customers, count "how many real introductions happened this month" instead.
Mechanism: a single-item intention scale measures how someone is willing to present themselves at the moment of asking. Three things sit between that and revenue — the intention-to-action gap, whether they ever spoke to a specific person, and whether that person bought. With any link unowned, a high score never turns into money.
In fairness: criticising Net Promoter doesn't mean satisfaction is unimportant. The real problem is that a badly over-compressed opinion got promoted to predictor and performance metric. To forecast revenue, watch behaviour — renewals, expansion, and introductions that actually happened.
Sixty minutes, turning "get customers to spread the word" into four things you can check.