The most important core principle of the Principles and Rules of Operation of the European Energy Certificate System (the PRO) is the prevention of EECS certificates being created or used more than once for the same energy; and of their being created where other certificates have been (or can be) created. This principle states that:

"The arrangements for issuing, transferring and cancelling EECS Certificates should be such as to eliminate the possibility of EECS Certificates of the same type being issued, registered or cancelled in respect of the same energy.

The arrangements for issuing EECS Certificates should be such as to eliminate the possibility of EECS Certificates being Issued in respect of the same energy and attributes for which other tradable Certificates (other than EECS Certificates of a different type where specifically permitted by the PRO) have or will be issued."

In short, the answer is most emphatically "no" – nobody may copy an EECS certificate!