It is customary to prepare letters of intent. They are generally nonbinding, as their main purpose is to register and summarize the status of the negotiations. Typically, letters of intent provide for the structure of the transaction and an exclusivity period. Provisions relating to confidentiality, standstill clauses, non-solicitation, exclusivity, costs and governing law and jurisdiction are usually binding provisions, while no commitment is normally assumed by the parties in relation to the finalization of the transaction.
Confidentiality obligations are often separately negotiated in agreements rather than provisions in letters of intent/term sheets (for further details, see the response to "Does a term sheet, in this context, customarily include provisions on exclusivity, break fee or confidentiality?" above). This is sometimes also the case for exclusivity. Regarding confidentiality, this is usually addressed by the parties before entering into any negotiation. Break fees are generally not used in Italy.
The Italian Civil Code mandates that all parties act in good faith during the negotiation and drafting of the acquisition agreements. Failing to do so will expose the defaulting party to pre-contractual liability (including making untrue statements, omitting essential information, and unjustifiably failing to complete the transaction after inducing a reasonable reliance through negotiations with the buyer that completion would have occurred).
In particular, where fraudulent misrepresentations by the seller induce the buyer to enter into an acquisition agreement, which the buyer would not have finalized had it been aware of the actual circumstances behind the transaction, the buyer may decide not to conclude the agreement. However, if the buyer would have still executed the agreement but under different terms and conditions, the same agreement is valid but the seller is liable for the damages possibly suffered by the buyer.