Because a prenup is usually executed as a deed, the safest approach is a traditional wet-ink signature, witnessed in person. Electronic signing of deeds is an evolving area of law, and on a document as important as a prenuptial agreement, getting the formalities wrong is simply not worth the risk. When it is this easy to sign on paper and remove all doubt, that is the sensible course.
Why a prenup is different from an ordinary contract
Plenty of everyday contracts can be signed electronically without difficulty. A prenup is more demanding because it is normally executed as a deed, and deeds carry stricter signing formalities than ordinary agreements. The most important of these is witnessing: a deed must be signed in the presence of a witness who attests the signature. That extra requirement is exactly where electronic signing gets complicated.
The witnessing problem
The witness genuinely needs to observe the signing — to be present when the signature is made. A fully remote, click-to-sign process is risky for a deed because it can be unclear whether that requirement was properly met. Was the witness truly present? Did they see the signature happen, or just receive a completed document afterwards? These are the kinds of questions you do not want hanging over an agreement if it is ever challenged years later. Any doubt about the formalities is an opening for a partner who wants to argue the prenup should not stand (see can a prenup be overturned?).
The safe approach: wet ink, in person
To avoid any doubt, keep it simple:
- Print the agreement and sign it on paper, in ink.
- Have your independent witness physically present to watch you sign, then sign themselves.
- Keep the signed original safe, with the disclosure schedule and advice letters (see storing your prenup).
Doing the formalities properly is part of what protects the agreement if it is ever tested (see are prenups legally binding? and how to sign a prenup). Preparing a prenup online and then printing it to sign gives you the best of both worlds: an easy drafting process and a rock-solid signature.
What “executed as a deed” demands
The reason electronic signing is delicate here comes down to the deed formalities. An ordinary contract can often be concluded loosely — even by email — but a deed is held to a higher standard, and the requirement that trips up remote signing is witnessing. The law expects the witness to be present when the signature is made and to attest that they saw it happen. A click-to-sign platform can capture a signature, but it does not obviously satisfy “in the presence of a witness” in the way a person standing beside you plainly does. On a document as consequential as a prenup, you do not want the effectiveness of the whole agreement to hinge on an unsettled question about whether that formality was met (see what makes a prenup invalid).
Why the smallest doubt is not worth it here
With many documents, a slight uncertainty about signing method is a tolerable risk because the stakes are modest. A prenup is the opposite: it may be relied on years later, at a moment of conflict, when the other partner has every incentive to look for a way out. Any ambiguity about how it was signed hands them exactly that — an opening to argue the formalities were not properly observed and the agreement should not stand (see can a prenup be overturned?). Because the fix is so cheap and easy — print it, sign in ink, have a witness watch — there is simply no good reason to introduce a question mark that a determined party could later exploit. Belt-and-braces signing costs you nothing and removes a whole category of future argument.
Best of both worlds: draft online, sign on paper
None of this means you have to do everything the old-fashioned way. The sensible modern approach is to use technology where it genuinely helps and paper where it protects you. Prepare the agreement online, exchange disclosure and take advice digitally if you like, and then, for the one step that really matters, print the final document and sign it in wet ink with your witness physically present. You get the speed and convenience of an online process together with a signature that is beyond dispute (see how to get a prenup). It is the same logic couples apply to a will: happy to draft on a screen, but careful to sign the final version properly.
After signing: storing the wet-ink original
Because the physical signed deed is your strongest proof the agreement was properly made, look after it once the ink is dry. Keep the signed original somewhere secure, together with the disclosure schedule and each partner’s advice letters, and take a clearly labelled scan as a backup — while remembering the scan is a copy, not a substitute for the original (see storing your prenup and what to do if you lose it). There is no central register to fall back on, so your own careful storage of that wet-ink deed is what lets you demonstrate, years later, that everything was done correctly (see after signing a prenup).
Could the law on electronic deeds change?
This is a genuinely evolving area, and it is fair to say the direction of travel is towards greater acceptance of electronic signing across many kinds of documents. But there is a difference between a general trend and settled certainty for a witnessed deed that you intend to rely on many years from now. When you sign a prenup, you are not really signing for today; you are signing for a hypothetical future dispute that might arise a decade or more later, to be judged by the law and evidence available then. Given that long horizon, the cautious course is to use a method that is unquestionably sound now and will remain so, rather than one that is merely probably fine. Wet ink with a witness present is that method. Until the position on remotely witnessed deeds is beyond doubt, there is little to gain and a lot to lose from being an early adopter with a document this important.
A simple signing checklist
To keep the whole thing straightforward, it helps to have the signing day planned. Make sure the final agreement is fully drafted and both partners have taken their advice beforehand, so nothing is rushed on the day. Print the complete document, including the disclosure schedule. Arrange for an independent adult witness to be physically present. Each partner signs in ink while the witness watches, and the witness then signs and adds their name and address. Date it truthfully, gather every page of the signed original together, and store it safely with the supporting papers (see how to sign a prenup). It is a modest, half-hour ritual, and doing it properly is one of the cheapest forms of insurance you will ever buy for an agreement meant to last for years (see what to include).
Can you sign a prenup electronically?
Because a prenup is usually executed as a deed, the safest way to sign a prenup is the traditional one: a wet-ink signature, witnessed in person. To sign a prenup electronically is an evolving area, and the witnessing requirement is the sticking point — a witness genuinely needs to observe the signing, so a fully remote, click-to-sign process can leave it unclear whether the formalities were properly met. On a document this important, it is not worth the risk.
Frequently asked questions
Is an e-signature valid on a prenup?
It is risky for a deed — wet ink, witnessed in person, is far safer (see are prenups legally binding?).
Does the witness have to be there in person?
Yes — they must actually observe the signing (see who can witness a prenup?).
Can we draft the prenup online and still sign safely?
Yes — draft it online, then print it and sign on paper with a witness present.
Can the witness watch over a video call?
Remote witnessing of a deed is uncertain territory, so an in-person witness is the safe choice (see how to sign a prenup).
What happens if the signing formalities are wrong?
They can give a partner grounds to challenge the agreement, so it pays to get them right (see what makes a prenup invalid).
Do both partners need to sign the same paper copy?
Each signs in front of their own witness; keep the fully signed original together and stored safely (see storing your prenup).
Create your prenuptial agreement online
UK Prenup lets couples in England & Wales create a clear, fair prenuptial agreement online from £199, with your document generated instantly as a PDF. See how it works or get started.
UK Prenup is not a law firm and does not provide legal advice. A prenuptial agreement in England & Wales is not automatically binding, and both partners should take independent legal advice before signing.