N.M. Stat. § 32A-4-16
Ex-parte custody orders.
A. At the time a petition is filed or any time thereafter, the children's court or the
district court may issue an ex-parte custody order upon a sworn written statement of
facts showing probable cause exists to believe that the child is abused or neglected and
that custody under the criteria set forth in Section 32-4-16 [32A-4-18] NMSA 1978 is
necessary.
B. The ex-parte custody order shall be served on the respondent by a person
authorized to serve arrest warrants and shall direct the officer to take custody of the
child and deliver him to a place designated by the court.
C. The Rules of Evidence do not apply to the issuance of an ex-parte custody order.