Define the safe question
This workflow answers a narrow question: does one test value resemble a supported passport, US SSN, US driver's license, VIN, or license plate format? Start with synthetic or masked input. Never upload a real passport number, SSN, driver's license number, or other personal identity data just to perform a format check.
Choose the right path
Name the identifier family before opening a validator. passport-validator needs an issuing country. us-ssn-validator checks the US nine-digit structure and area-number rules. us-drivers-license-validator follows state-specific patterns and may offer auto-detection, which should remain a hint until the state is known.
For vehicle records, vin-validator is the path for a 17-character VIN structure and checksum, while license-plate-validator handles supported plate patterns with a selected country or cautious auto-detection. A plate or VIN format result does not identify a vehicle owner or prove registration.
Review what the result does not say
Record the jurisdiction, the safe test input, the validator used, and the exact format result. If the value fails, check field selection, spelling, separators, and jurisdiction before trying again. If it passes, keep the conclusion limited: format pass is not identity proof, ownership proof, document authenticity, official record confirmation, or legal eligibility. Continue with the authorized official workflow when any of those claims matter.