How can the competencies of Wikimedia trainers supporting open knowledge be recognised? How can their skills be enhanced? How can the training offered be guaranteed to be of a high standard? How can new volunteers become trainers? How can a list of trainers be defined to recommend to institutions and schools? In 2024, Wikimedia Italia certified its first 12 trainers for the Wikimedia and OpenStreetMap projects. This is a presentation of the method and how it can be replicated.

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