Custody and Parentage for Unmarried Parents in Colorado

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Establishing parentage and getting a parenting order are two separate steps. The second does not happen automatically when the first is done.

Once parentage is established, Colorado treats unmarried parents the same way it treats divorcing parents. The same best interests standard applies, and the same parenting time and decision-making framework governs.

The difference is the route in. Married parents arrive at that framework through a divorce case. Unmarried parents establish parentage first, and how they do that decides whether orders come in the same case or a later one.

Most of the confusion in this area comes from collapsing those two steps into one. This page keeps them apart.

Colorado Law Uses Neutral Terms Now

Colorado modernized this part of the Children’s Code. References to paternity apply equally to parentage, and references to father and mother include a parent of any gender.¹ The form once called an acknowledgment of paternity is now the acknowledgment of parentage.

This is not only a wording change. It matters for parents in a civil union, for same-sex couples, and for families formed through assisted reproduction, all of whom the older material tended to leave out.

How Is Parentage Established?

Colorado recognizes several ways the parent and child relationship is established.² Which one applies to you determines what you need to do next, and how quickly.

Some parents are presumed parents without doing anything. A person is presumed to be a parent if they and the parent who gave birth were married or in a civil union.³

The child must have been born during it, or within three hundred days after it ended. Genetic testing showing a probability of ninety-seven percent or higher also creates a presumption.

The presumption that matters most to unmarried parents is different. A person is presumed to be a parent if they receive the child into their home and openly hold the child out as their own. That must happen while the child is a minor, and the statutory list includes several others.

A presumption can be rebutted, but only by clear and convincing evidence. If two presumptions conflict, the court applies the one founded on the weightier considerations of policy and logic.

The most common route for unmarried parents is the voluntary acknowledgment of parentage. The parent who gave birth and the other parent sign it, often at the hospital, and it can also be signed later through vital records.

A parent who is married or in a civil union and gives birth faces an extra condition. They can sign one with someone other than their spouse or partner only if that spouse or partner signs a denial of parentage.

If the other parent will not sign, the route is a court action, and genetic testing is usually ordered. The county child support unit can also establish parentage administratively without a court case, which many parents do not realize is an option. The steps involved in establishing paternity in Colorado differ depending on which of those routes you are on.

What the Acknowledgment Actually Does, and How Long You Have

The acknowledgment takes effect when it is filed with the state registrar of vital statistics. Once it does, it is equivalent to an adjudication of parentage and carries all the rights and duties of a parent.

It is also how an unmarried parent gets onto the birth certificate. Signing the birth certificate is not a separate route, which is the point the older version of this article got backward.

The window to undo it is short and has two triggers. The first is sixty days after signing. The second is the date of any proceeding about parentage or support to which the signer is a party.

The second trigger closes the door sooner than people expect. If you become a party to a county support proceeding before day sixty, the window can close on the date of that proceeding rather than at day sixty.

After that window, an acknowledgment can be challenged in court only on the basis of fraud, duress, or mistake of material fact, and the challenger carries the burden. Support obligations continue during the challenge except for good cause. What counts as a mistake of material fact is narrower than most people assume, and challenging paternity in Colorado sets out the standard a court applies.

Who Can File, and By When

More people can bring a parentage action than most parents realize. The statute allows a child, the parent who gave birth, a person presumed or alleged to be a parent, and the delegate child support enforcement agency, among others.⁴ A personal representative can act for someone who cannot act for themselves.

The deadlines are where the live version of this article was thin. An action brought by a parent, or by the delegate child support enforcement agency, must generally be brought before the child’s eighteenth birthday.⁵ An action brought by a child whose parentage has not been determined may be brought at any time before the child’s twenty-first birthday.

That difference matters. The twenty-first birthday figure circulates widely and belongs to the child, not to the parent who is running out of time.

A separate deadline applies in the other direction. An action to disprove a parent and child relationship presumed from a marriage or civil union must be brought within a reasonable time. It must also be brought no later than five years after the child’s birth.

That same section says actions to establish a presumed relationship may be brought at any time. How that sits with the general eighteen-year rule is worth legal advice rather than a confident answer here.

Serving the other party also has an immediate effect. In a parentage case filed by a parent, an automatic temporary injunction takes effect once the other party is personally served or waives service.⁶ Filing alone does not trigger it.

It lasts one hundred twenty days from its effective date, unless all parties consent to a change or the court shortens or lengthens it. Among other things, it bars either parent from removing the child from Colorado without the consent of all parties or a court order.

One exception matters here. Cases initiated by the delegate child support enforcement unit do not carry this injunction, and county-initiated cases are common for unmarried parents.

Not sure which step you are on?

Establishing parentage and getting a parenting order are separate questions, and sometimes separate filings. The sixty day rescission window also moves. Schedule a free consultation with Johnson Law Group and we will tell you where you stand and what to file next.

Parentage Is Not a Parenting Order

This is the step most people miss. An acknowledgment establishes who the parents are. It does not set a parenting time schedule, allocate decision-making, or fix a support amount.

If the two of you agree on a schedule and keep to it, you may never need more. If you disagree, or if you want something enforceable, you need a court order.

Whether that means a new case depends on how parentage was established. If you signed an acknowledgment, getting orders means opening one. If parentage is decided in court, the same judgment can also address support, the allocation of parental responsibilities, parenting time, and guardianship.⁷

Once the court is allocating parental responsibilities, the same standard applies as in any other case. It decides parenting time and decision-making on the child’s best interests, with the child’s safety paramount.⁸ The court will not presume that either parent is better able to serve the child because of that parent’s sex.

There is no default that the parent who gave birth keeps the child. There is also no rule that the court picks the more capable parent, because the usual outcome allocates responsibilities between both.

The best interests factors themselves run to a long statutory list, and Colorado child custody walks through what a court weighs under each.

Child Support and Benefits

Support runs on the same guidelines regardless of whether the parents were married. Colorado uses an income shares model that looks at both parents’ incomes and the parenting time schedule.⁹ The obligation follows the order, not the relationship between the parents.

Establishing parentage is what unlocks it. Until parentage is established there is no legal parent to order support from, and no legal parent through whom a child can claim benefits.

That does not mean the past is free. A parentage judgment can order support for the period before the support order begins, and the court may limit that liability to a just share of expenses already incurred. It can also cover genetic testing and the reasonable expenses of pregnancy and birth.

Those benefits are worth naming. They can include health insurance through a parent’s employer, Social Security and veterans benefits, inheritance rights, and access to family medical history.

The calculation itself turns on both incomes, the overnight schedule, and adjustments for health insurance and childcare. Colorado child support sets out how those pieces fit together.

Frequently Asked Questions

Do unmarried parents have the same custody rights as married parents in Colorado?

Once parentage is established, yes. The same best interests standard and the same parenting time and decision-making framework apply. The difference is the route in, because unmarried parents usually establish parentage first and then ask for orders.

Does signing the birth certificate make me a legal parent?

Not on its own. In Colorado an unmarried parent gets onto the birth certificate by signing a voluntary acknowledgment of parentage, which is the document that establishes the legal relationship. The certificate reflects that step rather than creating it.

How long do I have to change my mind after signing an acknowledgment?

You can rescind within the earlier of sixty days after signing, or the date of any proceeding about parentage or support to which you are a party. After that, a court challenge is limited to fraud, duress, or mistake of material fact, and you carry the burden of proof.

Does the mother automatically get custody in Colorado?

No. Colorado law provides that the court shall not presume that any person is better able to serve the child’s best interests because of that person’s sex. The court allocates parenting time and decision-making between both parents based on the child’s best interests.

Is there a deadline to establish parentage?

Yes, and it depends on who files. A parent or the delegate child support enforcement agency generally must bring the action before the child’s eighteenth birthday. A child whose parentage has not been determined may bring one before their twenty-first birthday.

Talk With a Colorado Family Law Attorney

The parents who run into trouble here are usually the ones who assumed one step covered both. Parentage without an order leaves you without anything enforceable, and waiting past a deadline can close a route entirely.

Johnson Law Group handles parentage and parenting time matters across the state, and you can learn more about our approach on our Colorado family law page. You can find our offices in Denver, Colorado Springs, Commerce City, Englewood, and Fort Collins. You can also read about the background and experience of the attorneys on our team.

Schedule a free consultation and we will help you work out which step you are on and what to file.

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