A sponsor purchases a prepaid card that can be transmitted to an intended user with increased security. Using a prepaid card dispenser, the sponsor elects an amount for the prepaid card and is prompted for at least one telephone number at which a server platform should contact the sponsor when the intended user wants to authenticate the card. The sponsor may enter additional phone numbers that will be called if the sponsor does not answer the first number when called by the server platform. When an intended user has received the prepaid card, the intended user calls a telephone number associated with the server platform and is connected to the sponsor via a telephone bridge so that the sponsor may authenticate the intended user. The sponsor may then inform the server platform (e.g., via DTMF tones) that the card has been authenticated.