Certificate verification
Anybody holding the instrument can check the certificate is real.
Running a laboratory?
It is on every plan, on every document.
Your customers' site supervisors, auditors and their customers can check your work without calling you.
What the person scanning sees
One question, answered in seconds: can I rely on this today?
The page leads with the verdict and the due date, in letters large enough to read on a site in sunlight. Switch the states to see what each says — the sentences are the product's own.
A QR code and a random code on every document
No certificate or inspection report is issued without one. The QR code is on the document and on the label, and the code beside it can be typed in where a camera cannot reach.
Genuine, current, amended or withdrawn
Anybody holding the instrument sees whether the document is valid, past its due date, superseded by a later revision or withdrawn — and, where the laboratory signs its certificates, that the signature verifies and the file is unaltered.
Never switched off for non-payment
Verification answers whoever is holding the instrument, who never agreed to anything. It is not gated by any plan and keeps answering after a subscription lapses.
Random, never sequential
12 characters, about 60 bits of randomness, so nobody can count their way through a laboratory's certificates. Characters that are easy to misread are left out, and typed ones are forgiven.
Certificate verification
Valid
Next due 14 Mar 2027
This certificate is current and has not been amended or withdrawn.
- Certificate
- AB-0001-1
- Instrument
- Torque wrench, 20–100 N·m
- Calibrated
- 14 Mar 2026
- Issued by
- Southbank Calibration
Digital signature
Verified
Signed by this laboratory, and unaltered since it was issued.
What it never shows
The readings, the customer's other instruments, prices and anybody's contact details. The person scanning is entitled to know the document is genuine, not to read the customer's file. A certificate still in draft or under review reports as not found.
When something changes
Issued certificates are never edited. A correction is a new revision under the same number, the original is kept, and last year's code — on last year's sticker — starts saying the certificate has been superseded. A withdrawn certificate says it must not be relied upon.
Test & Tag too
Inspection reports verify the same way, in the words a site uses: past its re-test date, an item is out of test. A report carries no grade and never an accreditation mark, because inspection is not calibration.
Every CalibraWorks certificate and inspection report carries a QR code and a 12-character random verification code. Anybody can check it with no login: valid, expired, superseded or withdrawn, and which laboratory issued it. Verification is never switched off for non-payment.
Questions about verification
- Do I need an account to verify a certificate?
- No. Scan the QR code on the certificate or the label, or type the code printed beside it at the verification page. Nobody signs in, and there is nothing to install.
- What does verification show?
- Whether the document is valid, expired, superseded by a later revision or withdrawn; the certificate or report number, the instrument and its serial number, when it was calibrated or inspected and when it is next due, the result where one was stated, and which laboratory issued it. It never shows the readings, the customer's other instruments, prices or anybody's contact details.
- Why is the code random rather than a number?
- A number in sequence would let anybody work through every certificate a laboratory has issued by counting. The code is 12 characters drawn at random — about 60 bits — so it can only be known by somebody who holds the document. Lookups are also rate-limited per address.
- What happens when a certificate is amended?
- The original is kept, unchanged. The correction is a new revision under the same number with the reason stated, and the old code keeps working: it now says the certificate has been superseded and to ask the holder for the current version.
- Does verification stop if the laboratory stops paying?
- No. The person scanning the code is not the laboratory's customer and never agreed to anything, so verification is never switched off by a subscription — not by a lapsed card and not by a cancellation.
- Does it work for test and tag?
- Yes. An inspection report verifies the same way, in the words a site uses: an item past its re-test date shows as out of test, which on most sites means it should not be used until it is re-tested.
More on how a certificate is produced: calibration certificates, and every feature by plan.
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