Whenever a conveyance shows affirmatively that it was given as security it should be treated as a mortgage.
Whenever a conveyance is from the record owner to the holder of a mortgage on the property that fact alone does not place a subsequent purchaser on inquiry as to whether the conveyance was given as security and is not grounds for an objection unless by reason of the date or recital it places a purchaser on inquiry.
SDCL app TO CHAPTER 43-30 § 14-01