SDCL § 57A-3A-102: Instruments to be marked consumer paper--Holder not holder in due course.

If any contract for sale or lease of consumer goods or services on credit, entered into between a retail seller and a retail buyer, requires or involves the execution of a promissory note, instrument or other evidence of indebtedness, hereinafter called instrument, such instrument shall have printed conspicuously on the face thereof the words "consumer paper," and a holder of such instrument shall not be deemed a holder in due course.

Source: SL 1973, ch 295, § 2; SDCL Supp, § 57-10A-2.