A method of preventing identity theft where a personal document control number is assigned and printed on the document when the document is manufactured. The personal document control number is stored in an electronic file and transmitted to the database of a remote, independent, third party service provider. The document is distributed to a user who presents the document at the point of encashment/presentment and provides the personal document control number. The merchant/acceptor at the point of encashment/presentment contacts the service provider who validates or invalidates the transaction.