You Are Not Paying for the Check. You Are Paying for the Exceptions
The line item everyone misreads
A quote arrives with a per-check price. A buyer multiplies it by expected volume and calls that the cost.
That number is the cheapest part. The expensive parts are the checks that do not resolve cleanly, and nothing in a price list tells you how many of yours will not.
What you are actually buying is a decision about the awkward cases, and the vendor who quotes the lowest per-check price may be the one who sends the most of them to a human.
Where the money actually goes
The automated pass. A document is read, a face is matched, a result comes back in seconds. This is the part that gets priced and demonstrated.
The review queue. A worn document, unusual lighting, a name that transliterates three ways, an edge case the model has not seen. Somebody looks at it. That person costs more per case than the automated path costs per hundred.
The abandonment. A customer who is asked to retry twice and leaves. That cost never appears on any invoice, and for a consumer business it is often larger than both the others combined.
And the repeat. The same person, verified again, because a rule changed or a relationship aged. That one has a page of its own.
Why the queue is the whole game
Automation rate is set by your document mix, not by the vendor's average. A platform onboarding customers from twenty countries with a long tail of national ID formats will see a different rate from one onboarding a single domestic passport population.
So the useful question is not "what is your pass rate" but "what is your automation rate on my mix", which needs a sample of your traffic, and which most vendors cannot answer before a contract.
A vendor who quotes a single headline rate is quoting somebody else's customers.
The honest shape of the saving
Reuse does not make the first check cheaper. It makes the second one nearly free.
So the saving is proportional to how much of your volume is people who have already proved themselves somewhere, and inversely proportional to how much of your cost sits in exceptions rather than in the automated path. Both of those are your numbers.
If most of your spend is the review queue on first-time customers, portable credentials help you less than a better automation rate would, and we would rather say that than model it away.
What to ask any identity vendor
"What is your automation rate on a sample of my traffic?" Not the headline. Insist on the mix.
"What happens to a document your model has not seen?" The answer is a human, and the follow-up is what that costs and how fast it resolves.
"What has been independently validated, and by whom?" For us the answer is nothing, and the liveness gate specifically is where that matters most.
"How much of my volume is repeat customers?" Most buyers have never measured it, and it decides whether reuse is worth anything to them at all.
Where this leaves a decision
If your cost is concentrated in first-time verification of a difficult document mix, the lever is automation rate, and you should compare vendors on your own traffic rather than on ours.
On legal advice
Nothing here is legal advice.