What to know:
- Online prenups are legal; what determines enforceability is the process behind the document, not whether it was created on a website or on paper.
- For a prenup, state law decides whether an electronic signature counts: the federal ESIGN Act excludes contracts governed by state family law, while the state-level UETA, adopted by 49 states plus D.C., Puerto Rico, and the U.S. Virgin Islands, generally treats an e-signature like ink. New York uses its own e-signature law.
- The four things courts look at are written form, voluntary signing, full financial disclosure, and terms that are not unconscionable; some states add independent counsel or timing rules.
- Traditional attorney-drafted prenups typically run $3,000 to $10,000 or more per couple, while flat-fee online platforms start around $649 with notarization.
- First's process is built around exactly that: an agreement customized to the state whose law will apply, full disclosure between both partners, and online notarization, which together are the process side that decides whether an online prenup holds.
Yes. An online prenup is legal to create in every U.S. state and is enforced on the same terms as a paper one: in writing, signed voluntarily by both partners, with full financial disclosure and fair terms. Some states add signing formalities, such as notarization in New York or a seven-day review period in California.
If you are comparison-shopping online prenup options, there is a good chance one worry keeps surfacing: does something built on a website actually count? It is a fair question. A prenup is a serious document, and "online" can sound like a shortcut. Here is the reassuring part. An online prenup is a legal document. Whether an electronic signature counts on it is a question of state law: the state-level Uniform Electronic Transactions Act (UETA), which the Uniform Law Commission reports has been adopted by 49 states plus the District of Columbia, Puerto Rico, and the U.S. Virgin Islands, generally lets an electronic signature satisfy a signature requirement.
There is a distinction worth separating early, because most pages blur it. One question is whether a prenup is legal to create online. Another is whether it will hold up in court. The first has a clean answer. The second depends on the process behind the document, and that is true whether you sign on paper in a lawyer's office or on a screen at your kitchen table.
Is an online prenup legal?
Yes. An online prenup is legal to create in every U.S. state. The medium does not change the legal nature of the agreement. A prenuptial agreement, commonly called a prenup, is a contract between two people who are planning to marry, and contracts can be formed and signed electronically under both federal and state law.
What determines whether a prenup holds up is not the website or the paper. It is the process: whether the agreement was in writing, signed voluntarily, backed by full financial disclosure, and fair enough that a court will enforce it. A prenup built online can meet all of those requirements as well as one drafted by hand. We cover this same distinction in our guide to what a prenup template can and cannot do, because "legal to make" and "enforceable in court" are two different bars.
So the anxiety about "online equals not real" is misplaced. The thing that makes a prenup durable is the care taken in building it, and a structured platform is designed to build that care into every step.
Can you sign a prenup electronically?
In most states, yes, and it is state law that makes it so. The federal ESIGN Act, 15 U.S.C. §7001, says an electronic signature may not be denied legal effect solely because it is electronic, but 15 U.S.C. §7003(a)(2) excludes contracts governed by a state law on "adoption, divorce, or other matters of family law." A prenup is governed by your state's premarital agreement law, so the rule that matters is your state's version of UETA, which generally lets an electronic signature satisfy a law that requires a signature. New York, the one state without UETA, has its own Electronic Signatures and Records Act.
E-signature laws look for four things. First, intent to sign: both partners mean to put their names to the document. Second, consent to do business electronically: both agree to handle the transaction online. Third, association of the signature with the record: the signature is connected to the specific document, not floating loose. Fourth, record retention: the signed agreement is kept and can be reproduced later. The American Bar Association has published guidance confirming that electronic signatures meeting these conditions create enforceable agreements.
The other half of the question is your state's premarital agreement statute. Most require only that the agreement be in writing and signed by both partners, which an electronic record and signature can satisfy. Some require more, such as New York's rule that the agreement be acknowledged like a deed, which in practice means notarized. Those state formalities are where an online prenup is won or lost, and the next section lists them.
What makes any prenup enforceable, online or not?
Courts across the country look at the same core factors when deciding whether to enforce a prenup, and none of them has anything to do with whether the document was typed on a laptop. These four factors are universal, which is why we build our whole enforceability framework around them.
The first is written form. A prenup must be in writing and signed by both partners; verbal agreements do not count. The second is voluntary signing, meaning no coercion and no last-minute pressure the night before the wedding. The third is full financial disclosure: both partners lay out their income, assets, and debts so each is signing with eyes open. The fourth is that the terms cannot be unconscionable (so grossly one-sided that a court considers enforcing them unjust, judged as of the time the agreement was signed).
Many of these factors trace back to a shared legal foundation. Twenty-nine states and the District of Columbia have adopted some version of the Uniform Premarital Agreement Act or its successor, the Uniform Premarital and Marital Agreements Act, according to the Uniform Law Commission. That common framework is part of why the enforceability standard is fairly consistent from state to state.
Here is how an online prenup handles each requirement.
| Requirement | What it means | How an online prenup handles it |
|---|---|---|
| Written form | The agreement must be in writing and signed by both partners | A platform generates a written, signed document |
| Voluntary signing | No coercion, no last-minute pressure | A platform can start the timing clock well before the wedding |
| Full financial disclosure | Both partners disclose income, assets, and debts | A guided workflow prompts each partner through disclosure |
| Not unconscionable | Terms cannot be grossly one-sided at signing | Review, optionally with independent counsel, checks for fairness |
| Valid signature | Signature tied to a retained record with intent to sign | An e-signature that meets your state's e-signature law, plus an audit trail |
| State formalities | Timing, counsel, or witnessing rules where they apply | State-tailored steps, for example California's seven-day delivery rule |
Are there states where online prenups work differently?
Prenups are valid across the country. The signing formalities can differ in a few places, and you want to ensure you understand the rules in your state.
New York relies on its own Electronic Signatures and Records Act rather than UETA, so the legal machinery under an e-signature is a little different there, and its prenup statute adds an acknowledgment requirement. Illinois adopted UETA in 2021, replacing its older Electronic Commerce Security Act. The point is that state formalities still matter, so a platform tailored to your state is worth looking for. Our guide to vetting an online prenup service walks through what to check.
California adds two specific rules that are worth knowing because they trip up a lot of DIY agreements. Under California Family Code §§1612 and 1615, the final draft of a prenup must be delivered to both parties at least seven days before signing. And for a spousal-support waiver to be enforceable, each partner must have independent counsel. These are procedural conditions, not obstacles, but skipping them can unravel an agreement that is otherwise sound.
Here is what each state's law requires at signing, for the 46 states and Washington, D.C. where First is available. Each state links to its guide, which cites the statute in full:
| State | What the statute requires to sign | Source |
|---|---|---|
| Alabama | In writing and signed by the partner it will be enforced against, which is why you both sign | Ala. Code § 8-9-2(4) |
| Alaska | A written agreement both of you sign | Alaska guide |
| Arizona | In writing and signed by both of you, and enforceable without consideration. It takes effect when you marry | A.R.S. § 25-202(A), (B) |
| Arkansas | In writing, and signed and acknowledged by both partners, which is what a notary provides | Ark. Code § 9-11-402(a) |
| California | In writing and signed by both. The final agreement must be given to both partners at least seven calendar days before signing, and a spousal-support waiver needs independent counsel for each partner | Cal. Fam. Code §§1612, 1615 |
| Colorado | A written record signed by both partners | C.R.S. § 14-2-306 |
| Connecticut | In writing and signed by both of you, and enforceable without consideration | Conn. Gen. Stat. § 46b-36c |
| Delaware | In writing and signed by both partners | 13 Del. C. § 322 |
| District of Columbia | In writing and signed by both partners | D.C. Code § 46-502 |
| Florida | In writing and signed by both parties | Fla. Stat. §61.079(3) |
| Georgia | In writing, signed by both partners, and attested by at least two witnesses, one of whom is a notary public | O.C.G.A. § 19-3-62 |
| Hawaii | In writing and signed by both partners, and enforceable without consideration | HRS § 572D-2 |
| Idaho | In writing, signed by both partners, and acknowledged the way a grant of land is, which means signing before a notary | Idaho Code § 32-922 |
| Illinois | In writing and signed by both of you, and enforceable without consideration | 750 ILCS 10/3 |
| Indiana | In writing and signed by both partners, enforceable without consideration | IC 31-11-3-4 |
| Iowa | In writing and signed by both partners, and enforceable without consideration other than the marriage | Iowa Code § 596.4 |
| Kansas | In writing and signed by both of you, enforceable without consideration, and effective when you marry | K.S.A. 23-2403; 23-2405 |
| Kentucky | In writing and signed by the partner it will be enforced against, which is why you both sign | KRS 371.010(5) |
| Maine | In writing and signed by both partners | 19-A M.R.S. § 603 |
| Maryland | In writing and signed by the partner it would be enforced against, which is why you both sign | Md. Code, Cts. & Jud. Proc. § 5-901 |
| Massachusetts | A written contract made before the marriage | M.G.L. c. 209, § 25 |
| Michigan | In writing and signed by the partner it will be enforced against, which is why you both sign. Nothing is filed with a court | MCL 566.132(1)(c) |
| Mississippi | In writing and signed, since the statute of frauds bars enforcing an unwritten agreement made in consideration of marriage | Miss. Code Ann. § 15-3-1(b) |
| Missouri | In writing, and acknowledged by each partner before a notary or proved by one or more subscribing witnesses | RSMo § 451.220 |
| Montana | In writing and signed by both partners, and enforceable without consideration | Mont. Code Ann. § 40-2-604 |
| Nebraska | In writing and signed by both partners | Neb. Rev. Stat. § 42-1003 |
| Nevada | In writing and signed by both partners, and enforceable without consideration. A separate statute calls for marriage contracts to be acknowledged, so you notarize | NRS 123A.040; NRS 123.270 |
| New Hampshire | A written contract between two people in contemplation of marriage | RSA 460:2-a |
| New Jersey | In writing, with a statement of assets attached, and signed by both of you | N.J.S.A. 37:2-33 |
| New Mexico | In writing, signed by both partners and acknowledged, which means signing before a notary | NMSA § 40-3A-3 |
| New York | In writing, signed by both, and acknowledged or proven in the manner required to record a deed (in practice, notarized) | N.Y. Dom. Rel. Law §236(B)(3) |
| North Dakota | In a record and signed by both partners | N.D.C.C. § 14-03.2-05 |
| Ohio | In writing and signed by the partner it would be enforced against, which is why you both sign | R.C. 1335.05 |
| Oklahoma | In writing and signed by both partners. Notarizing gives you clear evidence you both signed | Oklahoma guide |
| Oregon | In writing and signed by both partners, and effective the day you marry | ORS 108.705, 108.715 |
| Pennsylvania | Section 3106 lists no signing formality of its own. Put it in writing and both sign, well before the wedding | 23 Pa.C.S. § 3106 |
| Rhode Island | In writing and signed by both partners | R.I. Gen. Laws § 15-17-2 |
| South Carolina | In writing and signed by the partner it would be enforced against, which is why you both sign | S.C. Code § 32-3-10 |
| South Dakota | In writing and signed by both partners, enforceable without consideration | SDCL 25-2-17 |
| Tennessee | In writing and signed by the partner it would be enforced against, which is why you both sign | Tenn. Code Ann. § 29-2-101(a)(3) |
| Texas | In writing and signed by both parties; enforceable without consideration | Tex. Fam. Code §4.002 |
| Utah | In writing and signed by both partners, enforceable without consideration | Utah Code § 81-3-202 |
| Vermont | A written agreement both of you sign | Vermont guide |
| Virginia | In writing and signed by both parties; effective upon marriage | Va. Code §20-149 |
| Washington | In writing and signed by the partner it will be enforced against, which is why you both sign. Notarizing is customary | RCW 19.36.010 |
| Wisconsin | A marital property agreement signed by both spouses, enforceable without consideration | Wis. Stat. § 766.58(1) |
| Wyoming | A written agreement both of you sign | Wyoming guide |
Even where a state does not require it, notarizing a prenup is common practice because it confirms who signed and when. Our guide to whether a prenup needs to be notarized covers it state by state.
The takeaway is not that online prenups fail in these states. It is that the process has to respect the local rules, and a structured platform is built to do that.
Does an online prenup hold up in court?
It can, when the process is done with care. Remember the four factors: written form, voluntary signing, full financial disclosure, and terms that are not unconscionable. A judge reviewing a prenup is checking those boxes, plus any state-specific formality like California's timing rule.
This is where the online route can quietly help. A guided platform prompts each partner through disclosure, timestamps the steps, and produces an audit trail tied to the signed record. Compared with an informal DIY agreement drafted from a generic template, that kind of structured record tends to leave fewer gaps for a court to question later. It is a process observation, not a promise of any outcome; enforceability is decided case by case by a judge.
For couples who want more certainty, independent legal review for each partner is the strongest enforceability practice, and in California it is required for a spousal-support waiver. If you are weighing your options, our comparison of DIY, attorney, and guided paths lays out where each one lands.
There is also the cost picture, which is often what pushes couples toward the online route in the first place. Traditional attorney-drafted prenups typically run $3,000 to $10,000 or more per couple. Each partner's attorney bills by the hour, which is why the total is hard to predict until the work is done. Flat-fee online platforms start much lower; First's Self-Serve package is $649, and the Lawyer Review package, which adds independent attorney review, is $3,500. No hourly billing, no PDFs to wrangle, no guesswork about whether it counts. For more on where the money goes, see our breakdown of how much a prenup costs.
Frequently asked questions
Is an online prenup legal?
Yes. Online prenups are legal to create in every U.S. state. What determines whether one holds up is the process behind it: written form, voluntary signing, full financial disclosure, and fair terms. A prenup built online can meet all of those requirements as well as a paper one.
Can you sign a prenup with an electronic signature?
In most states, yes. Because the federal ESIGN Act excludes contracts governed by state family law, a prenup's e-signature rests on state law: UETA in 49 states plus D.C., and New York's own e-signature law. These generally let an electronic signature count when both partners intend to sign, agree to sign electronically, and the signature is tied to a retained record. Some states add formalities, such as New York's acknowledgment requirement.
Do online prenups hold up in court?
They can, when the process is done carefully. Courts examine whether the agreement was in writing, signed voluntarily, backed by full financial disclosure, and not unconscionable. A structured online platform that walks both partners through disclosure often produces a cleaner record than an informal DIY agreement.
Is a digitally signed prenup valid in every state?
Nearly, but not identically. UETA has been adopted by 49 states plus D.C., and New York relies on its own Electronic Signatures and Records Act. The agreement can be valid in each of them, but the signing formalities differ by state: New York requires the agreement to be acknowledged like a deed, and California requires seven days between receiving the final agreement and signing it.
Is an online prenup as strong as one from a lawyer?
It depends on how much attorney involvement you want. Independent counsel for each partner is the strongest enforceability practice and is required in California for a spousal-support waiver. Many online platforms let you add independent review, which closes the gap between DIY and full attorney drafting.
Does an online prenup need to be notarized?
It depends on the state. Many states, including Texas, Florida, and Virginia, require only that the agreement be in writing and signed by both partners. New York requires it to be acknowledged in the manner required to record a deed, which in practice means notarized. Notarizing is common practice everywhere because it confirms who signed and when, and remote online notarization lets you do it without leaving home where your state allows it.
What can make an online prenup unenforceable?
The same things that undo any prenup: signing under pressure, missing or incomplete financial disclosure, terms so one-sided a court finds them unconscionable, or skipping a state formality like California's seven-day delivery rule. The medium is rarely the problem; the process is.
Getting started with First
If you are weighing whether an online prenup is the right route, First was built to handle disclosure, state formalities, and signing in one guided flow, on your timeline. Couples who want independent attorney review for each partner can add it with the Lawyer Review package. When you are ready, you can explore what is available in your state and take the next step with full information and time to decide.
