N.M. Stat. § 45-6-203
Types of account; existing accounts.
A. An account may be for a single party or multiple parties. A multiple-party account
may be with or without a right of survivorship between the parties. Subject to Subsection
C of Section 45-6-212 NMSA 1978, either a single-party account or a multiple-party
account may have a POD designation, an agency designation or both.
B. An account established before, on or after the effective date of Sections 45-6-201
through 45-6-227 NMSA 1978, whether in the form prescribed in Section 45-6-204
NMSA 1978 or in any other form, is either a single-party account or a multiple-party
account, with or without right of survivorship, and with or without a POD designation or
an agency designation, within the meaning of, and governed by Sections 45-6-201
through 45-6-227 NMSA 1978.