The answer to this question depends first of all on whether Italian or German law and whether the UN Sales Convention are applicable. If Italian law alone is applicable to the contractual relationship, then for general terms and conditions to be validly included, the contractual partner must have separately signed the clauses that are disadvantageous to him. According to German law, the user must have pointed out the general terms and conditions to the contractual partner and enabled him to take note of them. Under the UN Convention on Contracts for the International Sale of Goods, the GTC must have been made available to the contracting party at the time of conclusion of the contract. In all cases, the GTC must be written in the language of the contract or in any case in a language understandable to the contractual partner.