South Dakota Codified Laws
Chapter 02 - Suretyship
Section 56-2-1 - Suretyship defined.

56-2-1. Suretyship defined.
Suretyship is a contract by which one who at the request of another and for the purpose of securing to him a benefit becomes responsible for the performance by the latter of some act in favor of a third person or hypothecates property as security therefor.

Source: SDC 1939, ยง26.0201.