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xam Voucher: Oracle Certification Online Exams (6 months)/phis voucher is for online, non-proctored Oracle Certification exams. These exams are delivered online, without a proctor, via the Internet at your own location.oucher is valid for 6 months from purchase date.pplies only to 1Z0-051 and 1Z0-061.heck the racle Certification Retirementspage to ensure that your desired exam is not set to retire before you plan to take it. You can also subscribe to the racle Certification Blogto stay up-to-date on new and retiring exams and other announcements that affect your certification.