The fact that an instrument affecting title may not be dated, or that inconsistency exists between its date, the date of attestation, the date of acknowledgment or the date of recordation, does not impair marketability, unless the inconsistency is of such peculiar significance, when considered with other circumstances of record, as to impel a reasonable suspicion on the part of the examiner that the title may be defective.
SDCL app TO CHAPTER 43-30 § 16-01