The present invention is related to telecommunications, and in particular to systems and methods of using telecommunication services for user authentication. Account information is stored for a user, the account information including at least a first phone number associated with the user. A user order is received. A verification phone call is received from the user, the call including charge phone number information. The charge number information is compared to the first phone number to authenticate that the user is associated with the first phone number. Based at least in part on the comparison, the user order is selectively caused to be fulfilled.