This document discusses security for credit facilities. It defines security as an interest in property that secures the performance of an obligation. Security is distinguished from the source of repayment. Factors influencing the choice of security include the type and value of the asset, as well as ownership and chances of realization. Security can be classified as real/personal, consensual/non-consensual, and possessory/non-possessory. Types of security discussed include cash, debentures, guarantees, liens, mortgages, pledges, and set-off.