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Paternity Establishment Information
Paternity can be established several ways. For more information regarding paternity please see the Paternity Information for Parents Handbook.
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Mont. Admin. r. 37.8.311 - ADOPTIONS, NAME CHANGES
(3) Once paternity has been established, the registrants last name may only be changed through an adoption, legitimation, or court order. (4) Except in the
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User Guide to the 2014 Natality Public Use File
The presence of a paternity acknowledgment, therefore, is the most reliable indicator that the birth is nonmarital in the states not reporting this
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