N.M. Stat. § 39-4D-6
Procedure for recognition of foreign-country judgment.
A. If recognition of a foreign-country judgment is sought as an original matter, the
issue of recognition shall be raised by filing an action seeking recognition of the foreign-
country judgment.
B. If recognition of a foreign-country judgment is sought in a pending action, the
issue of recognition may be raised by counterclaim, cross-claim or affirmative defense.