Because nobody asked the board. Credda does not contact issuing bodies, so a license number on a Credda record is always the number you typed in, and it is shown that way on purpose.
You will not find a tick next to it. There is no setting that turns one on, no plan that buys one, and no amount of confirming that produces one.
What Credda shows instead
Every license number is served inside a block that states what it is. The sentence beside it is written by the server and shown exactly as written:
“This license number was entered by the holder. Credda has not checked it with the issuing body, and no issuing body has confirmed it. Check it against the issuer's own public register before relying on it.”
That sentence is the product being honest about its own limits, not a warning about you.
A witness confirming your certificate does not change it
You can ask a witness to confirm a certification, and for a certification the right person to ask is the issuing body itself. If somebody confirms it, the certification reads as confirmed.
The number still reads as entered by you.
The two are different assertions and the record keeps them apart. A witness confirms the fact that you hold the thing, as far as they know it. They did not open the register and look your number up. In the trades and in healthcare a tick beside a license number means the board checked it, and being wrong about that could put an unqualified person on a job where somebody gets hurt. So the tick does not exist.
Record the number so somebody else can check it
The useful thing you can do is make your number checkable by the person reading it.
Record the number exactly as it is printed on your document, and record where it applies. A reader can then take those two values to the board's own public register and check them in a minute. "Licensed electrician" is not something anybody can act on. A registration number and a jurisdiction is.
If a client needs proof of license, send them the register link with your number. That is the board saying it, which is what they actually want.
The one register check that exists in the product
There is a single register lane built in, and it is narrow.
If you are a US healthcare provider, you can enter your own National Provider Identifier and Credda will look it up in the public NPPES register and match it against the name on your account. You do this for yourself. There is no way to look anybody else up.
On a match, the server states what it did establish:
“This number is listed in the public NPPES register as an active individual enumeration, and the provider name on it matches the name on this account.”
And, in the same breath, what it did not:
“NPPES publishes what a practitioner submitted about themselves. It is not an independent check of their qualifications, training, licensure or standing, and no person confirmed anything here.”
Read the second half twice. A match proves the number resolves to an active individual record whose name matches yours, and nothing beyond that.
The check can be switched off by whoever runs the service. If it is off for your account, the card does not appear and nothing is recorded. If the register cannot be reached, you get told, and nothing is recorded.
It cannot move your reliability score. Qualifications sit on a published list of record types that never move the score in either direction.
What is not connected
Everything else. There is no connection to a dental board, a nursing register, Gas Safe, NICEIC, an accountancy institute, a state licensing board or a DBS check. No guide, page or email should suggest otherwise, and if you find one that does, it is wrong.
Two other lookups exist and neither one checks a license. One reads company officer listings from a business register, and it deliberately records nothing at all, because a company filing is a document you submitted about yourself and anyone can create one. The other reads public securities filings. Both are advisory, both are off unless switched on, and neither can mark anything as verified.
Why even a register is not treated as a person
Credda publishes a table of source types alongside its scoring model. It ranks a public register below a person who was there, because a public register mostly reprints what the subject told it, and a person confirming has something to lose. Under that table, a public register listing counts as an attestation with a link somebody can check, never as a confirmation.
If you want the strongest thing Credda can actually give you, it is not a license tick. It is a record of finished jobs your clients confirmed.