1. A gaming authentication method, comprising: receiving a request to initiate a gaming session from a user, the gaming session comprising: receiving a wager on a game; determining an outcome for the game; and presenting the outcome of the game; ascertaining whether the user is in a location for which the gaming session would be permitted; determining a telephone number associated with the location; placing a telephone call to the telephone number; prompting the user for a biometric response; and verifying whether the user is an authorized user based in part on the biometric response.