How to Establish Paternity in Alaska
Reviewed by DocDraft Legal Team · Alaska · Last updated 2026-09-12
In Alaska, establishing paternity means legally identifying a child's father so the child gains rights to support, custody, inheritance, and benefits. Alaska handles paternity through its legitimation and parentage statute, AS 25.20.050. Unmarried parents who agree can sign a form for acknowledging paternity under AS 18.50.165, which the statute treats as a legal finding of paternity. Either signer may withdraw it by the earlier of the federally mandated 60 days after signing or the start of a proceeding to establish support or paternity; after that it can be contested only for fraud, duress, or material mistake (AS 25.20.050(l)). Two Alaska points are load-bearing. First, genetic testing that establishes a probability of parentage at 95 percent or higher creates a presumption of parentage that may be rebutted only by clear and convincing evidence (AS 25.20.050(d)), a lower threshold than the 99 percent many states use. Second, Alaska recognizes a marital presumption that a child born to a married woman is her husband's child, but that presumption comes from common law rather than a numbered statute, and it too is overcome by clear and convincing evidence. AS 25.20.050 does not set a fixed statutory deadline to seek a court determination of parentage, and once support is ordered there is no limitations period on collecting it (AS 25.27.225). Attorney review of your situation is available through DocDraft.
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Where are you in establishing paternity?
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What are the ways to establish paternity in Alaska?
Unmarried parents who agree can sign a form for acknowledging paternity under AS 18.50.165, which Alaska treats as a legal finding of paternity (AS 25.20.050). If parents disagree, a court or the Child Support Services Division determines parentage, usually after genetic testing, and can then enter a support order.
What genetic-testing result establishes paternity in Alaska?
Under AS 25.20.050(d), a genetic test that establishes a probability of parentage at 95 percent or higher creates a presumption that the person is a parent. That presumption can be rebutted only by clear and convincing evidence. This 95 percent threshold is lower than the 99 percent used by many other states.
Is a married mother's husband automatically the father in Alaska?
Alaska recognizes a common-law presumption that a child born to a married woman is the child of her husband. The presumption is not codified as a numbered statute, and it can be overcome in court by clear and convincing evidence, which usually means genetic testing that excludes the husband.
How long do I have to establish paternity in Alaska?
Alaska's legitimation and parentage statute, AS 25.20.050, does not set a fixed deadline to ask a court to determine parentage, so a determination can generally be sought while the child is a minor. Once child support is ordered, AS 25.27.225 places no limitations period on collecting unpaid support.
Alaska paternity law at a glance
Alaska is not a Uniform Parentage Act state; it establishes legal fatherhood through its legitimation and parentage statute, AS 25.20.050. A child is legitimated when the parents marry, when both sign a form for acknowledging paternity under AS 18.50.165, or when a court determines parentage on sufficient evidence. Two features stand out. Alaska's genetic-testing threshold is 95 percent: a test showing a probability of parentage of 95 percent or higher creates a presumption of parentage, rebuttable only by clear and convincing evidence (AS 25.20.050(d)), lower than the 99 percent standard used in many states. And Alaska's marital presumption that a child born during a marriage is the husband's child rests on common law rather than a numbered statute. A signed acknowledgment may be withdrawn only until the earlier of 60 days or the start of a support or paternity proceeding (AS 25.20.050(l)).
Establishing Alaska paternity for a child born to unmarried parents
Suppose a child is born in Alaska to unmarried parents who agree on the father. Both sign a form for acknowledging paternity under AS 18.50.165, which Alaska treats as a legal finding of paternity (AS 25.20.050). Weeks later one parent wants out. He can withdraw the acknowledgment only until the earlier of 60 days after signing or the day a support or paternity proceeding is started (AS 25.20.050(l)); after that, only fraud, duress, or material mistake will undo it. Had the parents instead disputed parentage, either could ask for genetic testing, where a result showing a probability of parentage of 95 percent or higher creates a presumption of parentage rebuttable only by clear and convincing evidence (AS 25.20.050(d)). Had the mother been married when the child was born, her husband would be presumed the father under Alaska common law until overcome in court. Attorney review is available through DocDraft.
Relevant Laws
AS 25.20.050 (legitimation and determination of parentage)
Provides that a child born out of wedlock is legitimated when the parents marry, when the parents sign a form for acknowledging paternity under AS 18.50.165, or when a court or tribunal determines parentage on sufficient evidence, and designates the Bureau of Vital Statistics as the depository for acknowledgments and adjudications.
AS 25.20.050(d) (genetic-testing threshold)
Provides that a genetic test establishing a probability of parentage at 95 percent or higher creates a presumption of parentage that may be rebutted only by clear and convincing evidence.
AS 25.20.050(l) (withdrawal and challenge of an acknowledgment)
Provides that an acknowledgment signed on or after July 1, 1997, may be withdrawn only by the earlier of 60 days after signing or the date a proceeding is started to establish support or determine paternity, after which it may be contested only for fraud, duress, or material mistake.
AS 25.27.225 (support arrears as a vested judgment)
Provides that each installment of court-ordered child support becomes a vested judgment as it comes due and remains unpaid, so there is no limitations period barring collection of past-due support.
42 U.S.C. 666(a)(5) and 45 CFR 303.5 (federal voluntary acknowledgment and 60-day rescission)
Federal law requires every state child-support program to offer an in-hospital voluntary paternity acknowledgment, a 60-day period to rescind it, and a rule that after 60 days the acknowledgment may be challenged only for fraud, duress, or material mistake of fact.
Alaska Child Support Services Division
The Child Support Services Division, part of the Alaska Department of Revenue, establishes and enforces child support and can help establish parentage for children whose paternity has not been legally determined.
Regional Variances
Alaska paternity rules at a glance
Voluntary path
Unmarried parents establish parentage by signing a form for acknowledging paternity under AS 18.50.165, which Alaska treats as a legal finding of paternity. The Bureau of Vital Statistics is the depository for the acknowledgment (AS 25.20.050).
Withdrawal window
A signed acknowledgment may be withdrawn only by the earlier of the federal 60 days after signing or the start of a support or paternity proceeding (AS 25.20.050(l)). After that, only fraud, duress, or material mistake will undo it.
Marital presumption
Alaska's presumption that a child born to a married woman is her husband's child comes from common law, not a numbered statute, and is overcome in court by clear and convincing evidence.
Deadline to establish
AS 25.20.050 sets no fixed statutory deadline to seek a court determination of parentage, and AS 25.27.225 imposes no limitations period on collecting support once it is ordered.
Genetic-testing threshold
A genetic test at a probability of parentage of 95 percent or higher creates a presumption of parentage, rebuttable only by clear and convincing evidence (AS 25.20.050(d)), lower than the 99 percent used in many states.
Who administers it
The Child Support Services Division, part of the Alaska Department of Revenue, establishes parentage and support; disputed parentage is decided by a court or authorized tribunal that can order genetic testing.
Suggested Compliance Checklist
Confirm whether the parents were married
Before signing or filing anything days after startingDetermine whether the mother was married when the child was born, which triggers Alaska's common-law marital presumption that the husband is the father until it is overcome in court by clear and convincing evidence. This shapes whether the acknowledgment route or a court case fits.
Get genetic testing if biological parentage is uncertain
Before signing an acknowledgment days after startingBecause a signed acknowledgment operates as a legal finding, obtain genetic testing first if there is any doubt. Under AS 25.20.050(d), a result showing a probability of parentage of 95 percent or higher creates a presumption of parentage.
Sign the acknowledgment of paternity
At the hospital or vital statistics office days after startingUnmarried parents who agree sign a form for acknowledging paternity under AS 18.50.165, which is treated as a legal finding of paternity (AS 25.20.050). Keep a copy. Attorney review of your paternity matter is available through DocDraft.
Track the federal 60-day withdrawal window
Earlier of 60 days or start of a support case days after startingIf you need to withdraw a signed acknowledgment, act before the earlier of 60 days after signing or the start of a proceeding to establish support or determine paternity (AS 25.20.050(l)). After that, only fraud, duress, or material mistake will undo it.
Seek a court determination if parents disagree
While the child is a minor days after startingIf parents do not agree, ask the Child Support Services Division to open a case or seek a court determination of parentage; in a contested case the tribunal orders genetic testing on request (AS 25.20.050(e)).
Keep records of the acknowledgment, testing, and orders
Ongoing days after startingSave copies of the signed acknowledgment, any genetic-test results, and court papers, and calendar the acknowledgment withdrawal window (AS 25.20.050(l)) so you do not miss the point at which the acknowledgment becomes final.
| Task | Description | Document | Days after starting |
|---|---|---|---|
| Confirm whether the parents were married | Determine whether the mother was married when the child was born, which triggers Alaska's common-law marital presumption that the husband is the father until it is overcome in court by clear and convincing evidence. This shapes whether the acknowledgment route or a court case fits. | - | Before signing or filing anything |
| Get genetic testing if biological parentage is uncertain | Because a signed acknowledgment operates as a legal finding, obtain genetic testing first if there is any doubt. Under AS 25.20.050(d), a result showing a probability of parentage of 95 percent or higher creates a presumption of parentage. | - | Before signing an acknowledgment |
| Sign the acknowledgment of paternity | Unmarried parents who agree sign a form for acknowledging paternity under AS 18.50.165, which is treated as a legal finding of paternity (AS 25.20.050). Keep a copy. Attorney review of your paternity matter is available through DocDraft. | - | At the hospital or vital statistics office |
| Track the federal 60-day withdrawal window | If you need to withdraw a signed acknowledgment, act before the earlier of 60 days after signing or the start of a proceeding to establish support or determine paternity (AS 25.20.050(l)). After that, only fraud, duress, or material mistake will undo it. | - | Earlier of 60 days or start of a support case |
| Seek a court determination if parents disagree | If parents do not agree, ask the Child Support Services Division to open a case or seek a court determination of parentage; in a contested case the tribunal orders genetic testing on request (AS 25.20.050(e)). | - | While the child is a minor |
| Keep records of the acknowledgment, testing, and orders | Save copies of the signed acknowledgment, any genetic-test results, and court papers, and calendar the acknowledgment withdrawal window (AS 25.20.050(l)) so you do not miss the point at which the acknowledgment becomes final. | - | Ongoing |
Frequently Asked Questions
Establishing paternity in Alaska means legally identifying a child's father so the child can receive support, custody, inheritance, and benefits. It can be done by signing a form for acknowledging paternity or through a court determination of parentage under AS 25.20.050, which Alaska calls legitimation.
Unmarried parents who agree can sign a form for acknowledging paternity under AS 18.50.165, which is treated as a legal finding of paternity (AS 25.20.050). If parents disagree, the Child Support Services Division or a court determines parentage, usually after ordering genetic testing.
Under AS 25.20.050(d), a genetic test showing a probability of parentage of 95 percent or higher creates a presumption that the person is a parent, rebuttable only by clear and convincing evidence. Alaska's 95 percent threshold is lower than the 99 percent standard several other states apply.
Alaska's parentage statute, AS 25.20.050, does not set a fixed statutory deadline to ask a court to determine parentage, so a determination is generally sought while the child is a minor. Once support is ordered, AS 25.27.225 imposes no limitations period on collecting unpaid support.
Alaska recognizes a common-law presumption that a child born to a married woman is her husband's child. Because it comes from common law rather than a numbered statute, there is no code section to cite, and the presumption is overcome in court by clear and convincing evidence, typically genetic testing.
Yes, but only briefly. Under AS 25.20.050(l), a signed acknowledgment may be withdrawn only by the earlier of 60 days after signing or the start of a proceeding to establish support or determine paternity. After that, it can be contested in superior court only for fraud, duress, or material mistake.
Not automatically. Once the withdrawal window under AS 25.20.050(l) has passed, a signed acknowledgment operates as a legal finding of paternity and can be contested only for fraud, duress, or material mistake, with the challenger carrying the burden. A later test alone may not be enough to undo it.
The Child Support Services Division, part of the Alaska Department of Revenue, can establish parentage and open support cases, and the Bureau of Vital Statistics is the depository for acknowledgments and adjudications (AS 25.20.050(b)). Disputed parentage is decided by a court or authorized tribunal.
Other Alaska guides
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