It can also be illustrated as follows: A support contract is a contract that encourages a person to enter into a separate “primary” contract. For example, if X agrees to purchase Y products manufactured accordingly by Z, based on Z`s assurance of the high quality of the goods, X and Z may consider that X and Z have entered into a warranty contract consisting of Z`s promise of quality, which, given X`s promise to enter into the main contract with Y , was given. This rule prevents parties from changing the importance of written contracts with oral or tacit agreements that are not included in the original contract, the latter impairing their integrity. This means that, when a contract is available in writing, subsequent agreements that are not entered into in writing are not proven in a contractual dispute. There are, however, several exceptions to this rule. A security contract, if forged between the same parties as the main contract, must not be contrary to the main contract. In other words, if the term was agreed before the formal contract was concluded (but was still in place and could not be executed before the end of the second term), the first term will remain eligible.  In essence, security contracts cannot contradict an element of the main contract or the rights that flow from it.  The project must have expressly or implicitly requested the main contract and its declaration of forgiveness must have been intended to bring the other party into the main contract.  According to Lord Denning MR, a support contract is considered binding “when a person gives a commitment or assurance to another who intends to react by entering into a contract.”  The above guarantees are offered by the debtor to ensure the secured part: In the English case Barry v Davies, it was found that a censor and a buyer had entered into a guarantee contract.
 It has been found that, although the main contract does not concern the incense, the benefits granted to the bid represent a good consideration for the increase in the price of the offer.  Most security contracts are one-sided, which means only one party, in exchange for money. B, makes a promise (for example, the provision of a product or service). The agreement with the original contract is the consideration for the security contract. One theory confirms that it is possible to characterize creditworthy letters as an auxiliary contract for a third-party recipient, since letters of credit are driven by the need of the buyer and, in accordation of Jean Domat`s theory, to the cause of a letter of credit, a bank issues a credit in favour of a seller in order to exempt the buyer from his obligation to pay directly to the seller with a legal offer. There are three different companies involved in the letter of credit transaction: the seller, the buyer and the banker. Therefore, an accreditation contract is theoretically understood as a guarantee contract, which is accepted by a behaviour or, in other words, as a tacit contract.  It will soon be called LOC This volunteer agreement can be used by an organization that accepts volunteering from people who are not contractors or collaborators. PandaTip: The proposals of this legislature are brief and cover the main points of a collateral agreement, while the details are left to the law of the established contracts. It is advisable that a licensed lawyer review this agreement before the parties involved sign it.