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EPCM
In accordance with the Dispatch of Chief Executive n.° 261/2009, which creates Electronic Postal Certification Mark (EPCM) and approves its Regulation, Macao Post and Telecommunications Bureau (hereinafter CTT) accepts electronic documents of citizen, companies and public entities, in order to append on it a certain date and time by electronic means.

EPCM attests the date and time of the appending, and the integrity of the document, enabling the detection of any posterior change. CTT keeps the electronic registry of the appended EPCM, enabling that authorized persons check the integrity of the document and the date and time appended on it.

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