In the case of a bilateral guarantee contract, the two parties concluding the main contract also enter into the guarantee contract. A tripartite security agreement contains an obligation of a third party that is not a party to the original contract. This is often used, for example, in the case of a sales contract. The above security rights are offered by the debtor in order to guarantee by the insured party: a theory that is feasible to qualify as a contract of guarantee accrediting for a third party beneficiary is valid, because the credits are motivated by the need of the buyer and, in application of the theory of Jean Domat, the cause of a credit is that a bank has a credit in favor of a seller, to exempt the buyer from his obligation to pay directly to the seller as legal tender. There are indeed three different entities that participate in the accrediting transaction: the seller, the buyer and the banker. Therefore, a credit corresponds theoretically to a guarantee contract accepted by the conduct, or, in other words, to an implied contract.  It is briefly referred to as LOC Security contracts are an exception to the legal doctrine of the treaty which provides that a contract cannot impose obligations or confer rights on a non-contractual party.  However, in cases where an ancillary contract is entered into between a third party and one of the contracting parties, the Court may assert rights or impose obligations on the non-contracting party, as shown in the earlier Donoghue case against Stevenson.  It can also be embodied as follows: a contract of guarantee is a contract that induces a person to enter into a separate “primary” contract. For example, if X agrees to purchase goods from Y manufactured accordingly by Z, on the basis of Z`s assurance of the high quality of the goods, X and Z may have entered into an ancillary contract consisting of Z`s quality promise, taking into account X`s promise, the main contract with Y has been given. An ancillary contract is a contract in which the parties to a contract enter into another contract or promise to enter into another contract. The two treaties are therefore linked and can be applied, although they do not constitute a constructive element of the original treaty.  In JJ Savage and Sons Pty Ltd v.
Blakney, a mere expression of opinion was found insufficient to be kept as a promise. . . .