This article presents the impact of constitutional courts in shaping the fair trial standards in the context of new technologies application in the criminal proceedings. Surveillance measures based on the use of new technologies by law enforcement agencies are highly intrusive in nature and may violate not only the constitutional right to privacy, but also, in the author's opinion, guarantees of the fair trial and procedural rights of the suspect. The aim of the article is to indicate to what

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... tent constitutional courts have contributed to establishing the procedural standards in the activities of gathering evidence using new technologies (regarding both content and metadata), as well as to present potential problems in this area that courts will have to face in the future.