1. the process of determining that a specific identifier exists

    Source: Cabinet Office, Identity Fraud: A Study, UK Cabinet Office. July 2002.

2. "a process that determines if data (e.g. address, phone, and SSN) are real. At this level there are two concerns:

• Do the specific personal identifiers , e.g. address, phone and SSN, exist?
• Are the elements in the appropriate format as identified by the issuer of the data (e.g. driver's license number and social security number)?"

    Source: Gordon and Willox, Using identity Authentication and Eligibility Assessment to Mitigate the Risk of Improper Payments

3. "validation" for the purposes of identification documents is the process of adding the legal attribution and registration number by the document issuer to the surface of a genuine identification document blank at the time of issue. The act of "bringing an genuine identification document blank into being"

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