Art. 1487 cc provides that "contractors can increase or decrease the effects of the guarantee and can also agree that the seller is not subject to any guarantee". This provision is to mean that contractors can freely agree on different guarantee conditions and, in extreme cases, they can even establish that no guarantee is due. However, according to the Ermellini, a clause of exclusion or reduction of legal guarantee rights, however, should be expressly agreed and signed with double signature pursuant to art. 1341 Civil Code, as clearly, radically reductive of the buyer's rights (Cass. 23.03.1993 n. 3418; 8.10.1976 n. 3345; 22.11.1982, n. 6011). However, there is a limit on the total exclusion of the guarantee: pursuant to paragraph 2 of art. 1487 cc “The seller is always, held for the avo.