Abstract: The present invention teaches systems and methods for validating a user's identity to a validating agent. The system includes a verifiable digital certificate (MPCs—Mobile Presentable Certificates) issued by a certifying authority to a user. The digital certificate is validated by a user device, configured to store and transmit the digital certificate, and an agent device, configured to receive the digital certificate from the user device. Preferably, the devices have a graphical display. MPCs can be transmitted by various communication methods. Verification of MPCs can be performed via a remote certifying authority. MPCs include: a driver's license, a customer discount card, a membership card, a competition-ranking status, and a venue admission ticket. Optionally, MPCs include quadrants which conform to an MPC standard. The method includes issuing an MPC to the user; and transmitting the MPC from a user device to an agent device of the validating agent.