Abstract: Use of a database/website or similar system, to store identification or other sensitive numbers, together with email addresses or other contact data in a linked association, for remote access by an organization to initiate usage notification to the true owner of the number collected, and to check a Fraud Alert status or similar setting for the number, and to compare the email address or other contact data obtained from a customer, not to include a PIN, to data stored in the database with the number collected, all of which, depending on the data components entered, will achieve deterrence of identity theft, rapid notification of number usage, rapid communication of a fraud alert or similar status, success or failure in obtaining or establishing an acceptable level of certainty that the customer is the true owner of the number, and a locking/unlocking capability for the number owners within the system domain.