To officially confirm that something is correct, legal, or meets required standards.
“Visitors must validate their parking ticket before returning to their vehicle.”
“The office will validate your documents within five business days.”
Diagrams about tickets, permits, or applications often mention validating information before it can be used (e.g., 'validate your parking ticket at the kiosk'). Look for what specific action or document is needed to validate something, since this is often a required step tested in questions. Confusing 'validate' with simply 'submit' is a common mistake to avoid.
Synonyms: confirm, verify, authenticate