N.M. Stat. § 48-10-18
Every deed of trust, substitution of trustee, notice of resignation of trustee, request for notice, assignment of beneficial interest in a deed of trust, notice of sale, cancellation of notice of sale or release of deed of trust which is entitled to recordation as provided in the Deed of Trust Act shall be indexed in the real estate records of the county clerk in which only part of the trust real estate is located with the trustor indexed as mortgagor, and if the name of the beneficiary appears on the instrument being recorded, the name of the beneficiary or that of the successor of the beneficiary shall be indexed as mortgagee. If the name of the beneficiary does not appear on the instrument being recorded, the name of the trustee or the successor or the trustee shall be indexed as mortgagee.
NMS § 48-10-18