A bond is a debt security, under which its issuer undertakes to repay to the bondholder the principal of the bond and the interest (the coupon) at a specified point in time, that is to be considered as the extinguishing of bonds. There are several types of bonds: bonds issued by the public sector, bonds issued by capital companies, publicly available bonds, private bonds, convertible bonds, subordinated bonds, etc. Several forms of bonds – bonds of materialized and dematerialized form – are also present. Bonds, their types, emission, purchase, acquisition of ownership, circulation on the secondary market and extinguishing of bonds have been developing since the origins of bond. This necessitates an understanding of the changes in the basic characteristics of bonds and their civil circulation.