The binding legal principles established are: (1) In terms of section 4(2)(c) of the National Credit Act, the Act applies to a credit guarantee (including a suretyship) to the extent that the Act applies to the underlying credit facility or credit transaction, regardless of whether the guarantor is a juristic person whose turnover exceeds the Minister's threshold under section 4(1)(a)(i). (2) Settlement agreements that deal with the same subject matter as the main credit agreement - by modifying credit terms, interest rates, repayment schedules, and enforcement mechanisms - constitute supplementary agreements as defined in National Credit Regulator v Lewis Stores. (3) Supplementary agreements that would be unlawful if their provisions were included in a credit agreement are prohibited by section 91(2) and are void under section 89(2)(c) and 89(5). (4) Credit providers cannot circumvent the peremptory debt enforcement procedures in sections 129-130 of the Act by concluding settlement agreements that provide for enforcement after shorter notice periods. (5) Court orders making unlawful settlement agreements orders of court are incompetent and should be rescinded as they do not accord with the Constitution, the law, and public policy. (6) The accessory nature of suretyship under common law is preserved by the Act - if enforcement provisions apply to the principal debtor, they apply to the same extent to the surety under section 4(2)(c).