Within a wireless computing device, a method of conducting commerce can include receiving a user input in the wireless computing device specifying an account to which a proposed transaction is to be billed and identifying contact information for a billing entity according to the user specified account. The billing entity can manage the account. An authorization can be requested from the billing entity via a wireless communications link established using the contact information. The method also can include receiving the authorization from the billing entity via the wireless communications link, generating a visual image which identifies the billing entity and represents the authorization received from the billing entity, and presenting the visual image upon the display screen of the wireless computing device. Accordingly, a visual image reader can read the displayed visual image.