What your software means when it says a record is “verified”

The four things called verification

1. Somebody typed it. An owner or a staff member entered a date into a field. Nothing checked it against anything. This is what most vaccination fields in most booking software are, and there is nothing wrong with it as long as it is not described as something else.
2. Software read a photo. A model extracted dates from an uploaded image or PDF and scored its own confidence. This establishes that text was legible. It does not establish that the document is real, that the clinic exists, or that the shot was given.
3. A person checked it against the document. Someone at the shop opened the certificate and compared it line by line to what is on file. This catches typos and mismatches. It cannot catch a document that is itself wrong.
4. The issuing clinic answered. The practice named on the certificate was asked, and said yes or no. This is the only one of the four that can contradict the paperwork — and the “no” is worth more than the yes, because a clinic denying a record it did not issue is the single most informative thing anyone in this chain can tell you.

Why a confidence score cannot be the top of that list

A scanner reports how sure it is that it read the characters correctly. That is a statement about image quality, not about truth. The two come apart in the direction that matters:

A clean forgery scores high. A photograph of a real certificate taken at an angle in bad light scores low. So a system that auto-accepts above a threshold is, structurally, more likely to wave through a well-made fake than a genuine document photographed badly on a phone in a car park. This is not a bug in anyone’s model. It is what a confidence score measures.

Is forgery actually a thing?

Yes, and it is prosecuted. Veterinary practices have uncovered forged vaccination paperwork presented in their own names; sellers have been reported for producing them in volume for litters of puppies; consumers have been scammed with fabricated records for animals they were buying. You do not need a crime wave for this to matter — you need one dog, one bite, and one investigator asking what your file was based on.

The honest ceiling, including ours

Nothing in this category can tell you a piece of paper is genuine by looking at it. What a record can carry is its provenance — an account of how each line arrived, kept beside the line itself, so that later on the question “how did you know?” has an answer other than a shrug.

That is what asking the clinic changes. It does not make a document unforgeable. It means a forged certificate now has to get past the practice whose name is printed on it — which is a much harder problem than getting past a scanner, and one that leaves a written trace either way. The seven ways a date can reach a file sets out the whole ladder.

What VaxCheck answers

• Every record shows how it got there, on the record — in your dashboard, in the owner’s portal, and in the export you hand an inspector.
• We never mark a pet compliant. We show what is on file and check it against the rules you set at your own door.
• A clinic’s “no” outranks every other source, including a staff member’s tick, and stays on the record.
• We never infer an expiry date. If the certificate does not print one, the record says so and asks.
• Dates are shown exactly as the document prints them. Here is how to read one.

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