Vouch is a verb

vouch
/vouCH/

intransitive verb

a: to supply supporting evidence or testimony
“Vouch licenses vouch for your privileges to access, use, and transact with shared devices.”
b: to give personal assurance
“Vouch exposes the chain of responsibility that ties a privilege on a device back to the humans, AIs, and organizations that vouched for the device.”
to give a guarantee : become surety
“Vouch licenses act as a self-evident proof that carry privileges that can vouch for their authenticity without requiring a third party.”

transitive verb

to summon into court to warrant or defend a title
“In-persons endorsements are required establish identity and ownership of titled assets before Vouch Licenses are able to vouch the owner’s privileges with that asset.”
a: prove, substantiate
“The Vouch license vouched my identity and access even without internet on the basement level of the garage.”
b: to verify (a business transaction) by examining documentary evidence
“Device-to-device transactions initiated with a Vouch License adds pre-validated identity data that vouches that transactions are not fraudulent.”