The Gadda family, thanks to the consultation and collaboration of a group of experts and connoisseurs of Mario and Gaetano Gadda’s instruments, can commission an evaluation and, if required, release a written document with their personal opinion regarding the authenticity of some instruments currently present in the international market.

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For the experts to undertake the research in order to  write the assessment, a written request must be sent by mail containing a minimum of 5 pictures of different angles of the instrument to inspect (soundboard, back, head, sound hole and label), and  the instrument’s measurements. If there were to be official documentation but doubts about its authenticity, it’s also necessary to send the picture of the certificate released by either Mario or Gaetano Gadda.