N.M. Stat. § 45-3-804
Manner of presentation of claims.
Claims against a decedent's estate may be presented as follows:
A. the claimant may deliver or mail to the personal representative a written
statement of the claim indicating its basis, the name and address of the claimant and
the amount claimed, or he may file a written statement of the claim with the appropriate
court. The claim is presented on the first to occur of receipt of the written statement of
claim by the personal representative or the filing of the claim with the appropriate court.
If a claim is not yet due, the date when it will become due shall be stated. If the claim is
contingent or unliquidated, the nature of the uncertainty shall be stated. If the claim is
secured, the security shall be described. Failure to describe correctly the security, the
nature of any uncertainty and the due date of a claim not yet due does not invalidate the
presentation made;
B. the claimant, without the necessity of filing a claim, may commence a proceeding
against the personal representative in any court where the personal representative may
be subjected to jurisdiction, to obtain payment of his claim against the estate, but the
commencement of the proceeding must occur within the time limited for presenting the
claim. No presentation of claim is required in regard to matters claimed in proceedings
against the decedent which were pending at the time of his death; and
C. if a claim is presented under Subsection A of this section, no proceeding thereon
may be commenced more than sixty days after the personal representative has mailed
a notice of disallowance. However, in the case of a claim which is not presently due or
which is contingent or unliquidated, the personal representative may consent to an
extension of the sixty-day period, or, to avoid injustice, the district court on petition may
order an extension of the sixty-day period, but in no event shall the extension run
beyond the applicable statute of limitations.