Documents relating to representation in an opposition

Technical requirements

The Spanish Patent and Trademark Office's Electronic Register service requires:


  • Internet explorer 11 or later, Mozilla Firefox or Google Chrome.
  • Adobe Reader XI or higher. Download Adobe Reader.


In Revocation of power of attorney and Renunciation of power of attorney procedures, identification/authentication is carried out through Cl@ve, so the user must have one of the procedures enabled on that platform (electronic national ID card, electronic certificate, Cl@ve PIN, etc.).

© Oficina Española de Patentes y Marcas, 2021

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