They say “Any man can be a father, but it takes someone special to be a dad.” It’s a reminder that biology is not the only thing — or even the most important thing — that ties a parent and child together. Love and care are as determinative of a child’s well-being as their DNA.
This sentiment is incorporated into New Mexico’s child custody laws. Establishing paternity gives you the opportunity to play an important role in your child’s life (and will require you to financially support them) but it is merely the key that opens the door to the possibilities of parenthood. The actions you take to claim your role as a dad can have a far greater impact on your ability to gain custody of your child.
This can be frustrating for fathers who want to play an active role in their child’s life, but are being denied that opportunity. As a seasoned family law attorney, Bob Matteucci can help you figure out how to establish your paternity and assert your parental rights in a way that ensures your child’s best interests are protected.
What Paternity Means in New Mexico
Paternity is about more than biology. It is a legal status.
New Mexico law grants parents certain rights and responsibilities based on it. Chief among them is the ability to seek custody of their child. As discussed below, this includes both physical time spent with the child, and the ability to make important decisions on behalf of the child.
Once paternity is established, parents have the responsibility to financially support their children. And children gain the right to inherit property, seek information about their parents, and access certain benefits.
In short, paternity is important. Its impact goes far beyond DNA or adoption.
Establishing Paternity
Because paternity is a legal construct, the “birds and the bees” is not the only thing you have to know about how someone becomes a father.
For families where parents are married at the time of birth, paternity is legally presumed. But for unmarried parents, same-sex couples, or in cases where paternity is uncertain, the law requires formal steps to establish paternity.
Presumed Paternity
If a child is born during a marriage (or within 300 days of its end), the spouse or ex is legally presumed to be the child’s parent.
Voluntary Acknowledgment of Paternity (AOP)
Unmarried parents may choose to establish paternity by signing a Voluntary Acknowledgment of Paternity (AOP) form. This document from the New Mexico Department of Health can be signed at the hospital when the child’s birth certificate and other paperwork is getting filled out or later. Once signed and filed with the state, these documents have the same effect as a court order.
Court-Ordered Paternity
When there is uncertainty or disagreement, the court may order genetic testing and issue a formal parentage order.
Paternity and Same-Sex Couples
If a child is born into a same-sex marriage, New Mexico law presumes that both spouses are legal parents, even though the child is biologically related to just one parent. If a same-sex couple is not married at the time of their child’s birth, the non-biological parent must take steps to assert their parenthood. This is typically done through adoption.
Formalizing paternity avoids ambiguity years down the road. It ensures that the child receives the full benefit of a legal parent-child relationship, and creates a clear foundation for custody and parenting decisions.
Custody and Time-Sharing in New Mexico
Once you have established paternity, New Mexico law requires you to take custody of your child. NM Stat § 40-4-9.1 specifies that:
(1) each parent shall have significant, well-defined periods of responsibility for the child;
(2) each parent shall have, and be allowed and expected to carry out, responsibility for the child’s financial, physical, emotional, and developmental needs during that parent’s periods of responsibility; and
(3) the parents shall consult with each other on major decisions involving the child before implementing those decisions.
This language emphasizes the important roles both parents play, meaning joint custody is the norm unless one parent is completely unfit for the job due to addiction, abuse, or mental illness.
And it describes parenting in very broad terms, emphasizing the importance of time spent together and taking financial responsibility for your child. But it also calls out the harder to describe parts of parenting that ensure you are raising a well-rounded and well-adjusted human.
In family law, we chop these up into a few different pieces. The financial aspects all fall under child support. The time you spend with your child is referred to as physical custody. And legal custody is the catch-all term that encompasses your responsibility for making good decisions on your child’s behalf.
How Courts Evaluate Custody Issues
Although state law suggests both parents will play an active role in their child’s life, the reality is every family’s custody agreement is different.
Some parents are really good at co-parenting. They communicate well, have flexible schedules, and don’t have financial or health issues that complicate things.
Most families aren’t quite so lucky. Parenting in general is hard. And co-parenting is even more difficult. Even the most well-crafted custody agreement isn’t going to change that.
What helps is remembering that your child is what matters most. This is the same approach New Mexico family court judges take when they are forced to step in and impose a custody agreement. When doing this, they consider factors like:
- You and your former partner’s preferences;
- Your child’s wishes;
- Your child’s interaction and interrelationship with you, your former partner, any siblings, and any other person who may significantly affect your child’s best interest;
- Your child’s adjustment to his or her home, school, and community; and
- The mental and physical health of all individuals involved.
You should note that there’s nothing in this list that implies that just because someone establishes paternity the court will award them equal custody.
Your DNA or relationship status can label you a parent, but it is how you behave that truly defines you. If you want custody, you need to act like it.
Frequently Asked Questions About Paternity and Custody in New Mexico
Do I really need to go to court and get a formal custody agreement if my child’s other parent and I still get along?
Yes. Even the most cooperative parents should formalize their agreements. A court order creates clarity, prevents misunderstandings, and protects the child’s best interest.
Is joint custody the norm in New Mexico?
Joint legal custody is presumed to be in the child’s best interest. Time-sharing depends on the family’s circumstances, but the law prioritizes meaningful time with both parents.
How long does it take to establish paternity?
If both parents agree, paternity can be established quickly. Disputed cases may take several months, depending on testing and court availability.
Can the court favor one parent over the other?
No. New Mexico’s child custody laws do not favor one parent or one gender. The only consideration is the child’s best interest.
What if my work schedule is demanding or unpredictable?
Your parenting plan can be customized to fit your family’s schedule. Courts understand that business owners and professionals may have unique demands and encourage realistic, child-centered solutions.
Serving Families with Dignity & Compassion
Establishing paternity and crafting a custody agreement that recognizes the important role both parents play in their child’s life is often more of a formality than it is a battle. Most of the Albuquerque area families the Matteucci Family Law team works with just want a plan that protects their children, supports their co-parenting relationship, and gives everyone a stable foundation for the future.
But if you are struggling to have your paternity acknowledged, or your relationship with your child is at risk, Attorney Bob Matteucci is here for you. Please contact him today to schedule a meeting.