with trifles") has no place in the field. However, whilst the details of the letter of credit can be understood with some flexibility the banks must adhere to the “principle of strict compliance” when determining whether the documents presented are those specified in the letter of credit. This is done to make the banks' duty of effecting payment against documents easy, efficient and quick. Legal basis Legal writers have failed to satisfactorily reconcile the bank’s obligation to pay on behalf of the applicant with any contractually-founded, academic analysis. That is to say, they have not examined legal effect of the banks obligation through a conclusive theoretical lens. This has produced several conflicting theories as to the contractual effect of a letter of credit. Some theorists suggest that the obligation to pay arises through the implied promise, assignment, novation, reliance, agency, estoppel and even trust and the guarantees. Although documentary credits are enforceable once communicated to the beneficiary, it is difficult to show any consideration given by the beneficiary to the banker prior to the tender of documents. In such transactions the undertaking by the beneficiary to deliver the goods to the applicant is not sufficient consideration for the bank’s promise because the contract of sale is made before the issuance of the credit, thus consideration in these circumstances is past. However, the performance of an existing duty under a contract may be a valid consideration for a new promise made by the bank, provided that there is some practical benefit to the bank A promise to perform owed to a third party may also constitute a valid consideration. It might also be feasible to typify letters of credit as a collateral contract for a third-party beneficiary, because three different entities participate in the transaction: the seller, the buyer, and the banker. Jean Domat suggests that because letters of credit are prompted by the buyer’s necessity, the cause of a LC is to release the buyer of his obligation to pay directly to the seller. Therefore, a LC theoretically fits as a collateral contract accepted by conduct or in other words, an implied-in-fact contract where the buyer participates as the third party beneficiary with the bank acting as the stipulator and the seller as the promisor. The term "beneficiary" is not used properly in the scheme of an LC because a beneficiary (also, in trust law, cestui que use) in the