To be validly registered pursuant to G.S. 47-20, a mortgage, deed of trust or conditional sales contract, or any combination of these, of both personal property and real property must be registered pursuant to the provisions of G.S. 47-20.1 for the real property covered by the instrument and pursuant to the provisions of G.S. 47-20.2 for the personal property covered by the instrument, and in each case the registration must be indexed in the records designated for the particular type of property involved.
N.C. Gen. Stat. § 47-20.3