certify
Definitions
To attest or confirm in a formal or legal document that a fact or statement is true.
To officially recognize or authorize someone or something as meeting specific standards or requirements.
Examples
The laboratory will certify that the water samples are free of contaminants.
You must have a notary public certify the document before it can be processed.
The instructor will certify the students once they have successfully completed the training course.
Synonyms
verify attest validate authenticate endorse guarantee confirm