N.M. Stat. § 55-3-205
Special indorsement; blank indorsement; anomalous
indorsement.
(a) If an indorsement is made by the holder of an instrument, whether payable to an
identified person or payable to bearer, and the indorsement identifies a person to whom
it makes the instrument payable, it is a "special indorsement". When specially indorsed,
an instrument becomes payable to the identified person and may be negotiated only by
the indorsement of that person. The principles stated in Section 55-3-110 NMSA 1978
apply to special indorsements.
(b) If an indorsement is made by the holder of an instrument and it is not a special
indorsement, it is a "blank indorsement". When indorsed in blank, an instrument
becomes payable to bearer and may be negotiated by transfer of possession alone until
specially indorsed.
(c) The holder may convert a blank indorsement that consists only of a signature into
a special indorsement by writing, above the signature of the indorser, words identifying
the person to whom the instrument is made payable.
(d) "Anomalous indorsement" means an indorsement made by a person who is not
the holder of the instrument. An anomalous indorsement does not affect the manner in
which the instrument may be negotiated.