The short version
- In the US, the federal ESIGN Act and state UETA statutes make an electronic signature as enforceable as a pen signature for almost all commercial and consumer contracts.
- Validity turns on four things: intent to sign, consent to transact electronically, attribution to the signer, and a retained record that can be reproduced.
- Wills, most trusts, court filings and many property deeds are carved out and still require ink, a witness or a notary depending on the jurisdiction.
- A typed name counts as a signature if you intended it as one — but a drawn signature and a decent audit trail are much harder for the other side to disown.
The law, briefly
Three instruments do nearly all the work. In the United States, the Electronic Signatures in Global and National Commerce Act (ESIGN, 15 U.S.C. § 7001) says a signature, contract or record may not be denied legal effect solely because it is in electronic form. Alongside it, the Uniform Electronic Transactions Act (UETA) has been adopted in almost every state; New York reaches the same result through its own Electronic Signatures and Records Act.
In the European Union, eIDAS (Regulation (EU) No 910/2014, amended in 2024) recognises three tiers: simple, advanced and qualified electronic signatures. All three are admissible; only a qualified signature is automatically given the same legal effect as a handwritten one across every member state. In the United Kingdom, the Electronic Communications Act 2000 and subsequent Law Commission guidance produce the same practical answer: an electronic signature is valid where the signer intended to authenticate the document.
Two frameworks, and the answer they both arrive at
ESIGN and UETA
- No record denied effect solely for being electronic
- A statutory list of excluded document types
- Affirmative consumer consent, with disclosures
Where both land
- Validity turns on the signer, not the technology
- A typed name can bind; a pasted image often will not
- The argument is about who signed and what they saw
eIDAS
- Simple, advanced and qualified tiers
- Only a qualified signature is automatically equal to ink
- Identity checked by a trust service provider
What actually makes a signature stick
Both the US and EU frameworks converge on the same four requirements. Miss one and you have a signature that is technically electronic but practically hard to enforce.
- 1
Intent to sign
The person must have meant the mark as a signature rather than as a note or a placeholder. A name typed into a "Prepared by" field is not a signature; the same name typed under "By signing below I agree" is.
- 2
Consent to transact electronically
Both parties must have agreed to do business this way. In business-to-business dealings this is usually inferred from conduct. For consumer contracts, ESIGN requires an affirmative, disclosed consent — and in some cases proof the consumer can actually access the format you are sending.
- 3
Attribution to the signer
You must be able to connect the signature to a person. Email links, IP and timestamp logs, a verification code, or a login all do this. A bare image pasted into a PDF does not, which is why the same signature file on every page is easy to dispute.
- 4
A retained, reproducible record
The signed document must be retainable and accurately reproducible by everyone entitled to it. In practice: keep the final flattened PDF, not a link to a document someone else can still edit.
Where electronic signing still does not work
ESIGN excludes a specific list, and states add their own. These are the categories where you should assume ink until you have checked local rules:
How much formality the document actually needs
E-signature, no ceremony
E-signature plus an audit trail
Check local rules first
Assume ink and witnesses
- Wills, codicils and testamentary trusts. A handful of US states now permit electronic wills under strict conditions, but the default remains a signed paper document with witnesses. Get this wrong and the document fails at exactly the moment nobody can fix it.
- Court documents. Filings, orders and pleadings follow the rules of the court in question, not ESIGN.
- Family law matters. Adoption papers, divorce decrees and some custody orders are excluded in many states.
- Property transfers. Deeds, mortgages and title documents frequently require notarisation, witnessing, or recording in a registry that will not accept an electronic instrument. Leases are usually fine; conveyances often are not.
- Notices with statutory formality. Utility shut-offs, foreclosure and eviction notices, and insurance cancellations sometimes prescribe a delivery method by statute.
- Negotiable instruments. Anything governed by UCC Article 3 — a physical promissory note that is meant to be transferable — has its own rules.
Typed, drawn, or certificate-based: does it matter?
Legally, all three can be valid signatures. Evidentially they are very different, and the difference only shows up when somebody denies signing.
| Method | Legal status | How easy it is to dispute |
|---|---|---|
| Typed name in a signature block | Valid where intent is clear | Easiest — anyone can type a name |
| Drawn signature image | Valid; the most common approach | Moderate — handwriting is personal, but images can be copied |
| E-sign platform with an audit trail | Valid, plus evidence of identity and timing | Hard — email, IP, timestamps and a tamper hash |
| Qualified electronic signature (EU) | Equivalent to handwriting by law in the EU | Hardest — identity verified by a trust service provider |
For a freelance contract, an invoice approval or an NDA between two businesses that know each other, a drawn signature on a flattened PDF is proportionate and routine. For a six-figure agreement with a counterparty you have never met, pay for the audit trail.
Sign a PDF free
Draw or type your signature, place it on the page, download the signed file. It runs in your browser — the document is never uploaded anywhere.
How to sign a document so it holds up
Before you send it back
- Sign the final version, not a draft — and check the version number or date on the document you are signing.
- Flatten the signature into the page so it cannot be moved or deleted by a PDF reader.
- Include the date beside the signature, even when the document has its own date field.
- Sign every page or initial every page only if the document asks for it — inconsistency invites argument.
- Send the signed file from an email address that is clearly yours, and keep the sent message.
- Save your own copy of the fully executed version, with all parties' signatures on it.
- For anything valuable, get the counterparty's signed copy back before you start performing.
That last point catches more people than any legal technicality. A contract you signed and returned, which the other side never signed, is frequently unenforceable — and you will have done the work.
What about scanned wet signatures?
Printing, signing, photographing and emailing back is still an electronic signature in the eyes of the law — the ink is irrelevant once it becomes a JPEG. It carries no extra legal weight and is worse in one respect: the resulting image-only PDF has no selectable text, so nothing can search it, review it or extract the terms. If you are going that route anyway, at least convert the photos into a proper PDF rather than emailing a camera roll.
Signing is the last step, not the first
It is worth saying plainly: a valid signature on a bad contract is a fully enforceable bad contract. The formality question is the easy one and it is usually settled in five minutes. The question that decides whether the deal costs you money is what is in clauses 7 through 14, which is a different job — see contract red flags for the ones worth checking before your signature goes anywhere near the page.
General information, not legal advice. This guide explains how these documents and rules generally work. Law varies by jurisdiction and changes, and none of it is applied to your circumstances here. For anything consequential, consult a licensed attorney where you are.
Frequently asked
Is a signature made with my finger on a phone legally valid?
Yes. The input device has no legal significance — what matters is that you intended the mark as your signature and that the document records it. A finger-drawn signature on a touchscreen usually looks closer to your real signature than one drawn with a mouse.
Does an electronically signed contract need a witness?
Most commercial contracts do not need a witness at all, electronic or otherwise. Where a witness is required — deeds in England and Wales, wills nearly everywhere, some affidavits — the witnessing requirement is separate from the signing requirement and often still demands physical presence. Check the rule for that document type in that jurisdiction.
Can someone deny they signed electronically?
They can try, and this is where the audit trail earns its money. If the only evidence is a signature image in a PDF, the dispute becomes your word against theirs. If there is an email delivery log, an IP address, a timestamp and a document hash, the argument usually ends quickly.
Do both parties have to sign the same way?
No. One party can sign electronically and the other in ink, and the contract is still valid. Mixed execution is common when one side has a policy against electronic signing.
Is a signature in an email — "Thanks, agreed, John" — binding?
It can be. Courts in several jurisdictions have found that a name at the foot of an email, or even an email footer, satisfied a signature requirement where the sender clearly intended to be bound. This cuts both ways: it means informal email exchanges can create binding commitments you did not plan on making.