New Mexico Statutes 7-38-36. Preparation and mailing of property tax bills
A. A copy of the property tax schedule prepared by the assessor shall be delivered to the county treasurer on October 1 of each tax year.
B. Upon receipt of the property tax schedule, the county treasurer shall prepare and mail property tax bills to either the owner of the property or any person other than the owner to whom the tax bill is to be sent. Tax bills shall be mailed no later than November 1 of each tax year. The validity of the tax, the time at which the tax is payable or any subsequent proceeding instituted for the collection of the tax is not affected by the failure of a person to receive his tax bill.
C. To obtain the maximum efficiency and coordination between their offices, a county treasurer and a county assessor may stipulate by written agreement that property tax bills be prepared or mailed, or both, by the county assessor. An agreement authorized under this subsection shall include provisions for the allocation of costs of the functions delegated to the county assessor and must be approved by the board of county commissioners.