Each register of deeds shall plainly endorse each instrument received for record, upon receipt, the date and time of reception of the instrument, and an identifying number. The identifying number may be a unique instrument number or book and page number, or both, that clearly identifies the specific instrument. The register of deeds shall enter the identifying number as part of the entry relating to the instrument in the appropriate indexes maintained by the register of deeds. The document shall indicate whether the instrument was received by electronic transmission and the number of pages recorded or filed with that instrument.
SDCL 7-9-8.1