Out of wallet (sometimes abbreviated as OOW) refers to private data used for authentication in activities such as telephone banking or internet banking to prevent identity theft.[1] The practice may part of a knowledge-based authentication process.
Ideally, out-of-wallet information is easily recallable by a user but obscure to most other persons and difficult for them to uncover. Prompts for out-of-wallet questions are now often generated automatically through convergence of databases containing users' financial transactions, vehicle registrations, and other records.[2]
Typical out-of-wallet questions a user may be asked include:
Such information is available to a database compiler but may not be readily available to criminals attempting to commit identity theft.