Corporate Finance and Banking Transactions In this area, Castro Barros renders assistance in the full range of traditional transactions, as well as in structured operations. Among the main activities of the Office, we can point out: Assistance in questions involving letters of credit and guarantee, loans and financing and standardized derivatives; Issuance of bonds and debentures, both in Brazil and abroad; Securitization; Project finance; Constitution of financial institutions; Hedges, swaps and export notes; Domestic and cross-border commercial, financial and operational leasing; Assignment and acquisition of contracts and credits between financial institutions.