This definition appears rarely
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Samples in periodicals archive:
New U.S. Emergency Photo-digital Passport. The State Department will also be issuing a new EPDP (Emergency Photo-Digitized Passport) in addition to the e-Passport.
but who is unable to obtain a locally-issued Emergency Photo Digitized Passport; applicant can then apply for an emergency passport for an onward destination.
The Emergency Photo-digitized Passport (EPDP) is a twelve-page emergency U.S. passport that replaces machine-readable and other emergency passports