The development and use of artificial intelligence in socio-economic relations are expected to have a significant impact on the banking and financial sector, also as a result of the spread of Fintech. The affirmation of new players in the market is undermining the bank-centric system, imposing a revision and rethinking of pre-existing legal institutions. The literature on fintech keeps evolving rapidly and there is an urgent need to organize its knowledge structure and thereby to make future research more focused on the gaps that will emerge in this paper. This contribution conducts a systematic literature review (network and content analysis) on the diffusion of the Fintech phenomenon in its various forms of manifestation all characterised by a process of disintermediation. For this study, the VOS viewer software was used. In particular, the co-occurrence of keywords was investigated through the full counting method. DoGi was the database used for data extraction. From the network analyses conducted, it appears that the literature has been widely discussed, even if not unequivocally, with the issue of the legal qualification of the fintech phenomenon and, specifically, of cryptocurrency. Content analysis reveals that the need for strict regulation at European and national level was unanimously stressed. The focus of this paper is to point out the importance of customer protection in the field of Fintech. It is necessary to establish whether or not, in the face of a marked legislative vacuum, the relationships between customers and service providers can be reconnected to situations that already exist in the codified experience and in the sector regulations. This situation should not be harmful to the customer. In this sector, the weakness is intensified. In addition to the knowledge asymmetry concerning the services offered, there is a lack of understanding of the functioning of digital technology and its underlying mechanisms. For these reasons, the systematic analysis of the literature conducted shows the need, on the one hand, for the legislator to regulate the phenomen, on the other hand for the interpreter to think about which forms of protection the customer can benefit from and which remedial mechanisms can be activated in the hypothesis of liabilityof the counterparties. In conclusion, this paper illustrates which protections rules provided for in the T.u.b., in the T.u.f., the Consumer Code and the Civil Code can be applied to the fintech phenomenon.