Guide
Is an Electronic Signature Legally Binding? ESIGN, UETA and eIDAS Explained
By the SignElectronically team 9 min read
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In this guide
Yes. In the United States and the European Union an electronic signature is legally binding for most business documents, provided the signer intended to sign, agreed to deal electronically, the signature can be tied to that person and the signed record is kept intact. The laws that say so are the ESIGN Act and UETA in the US and the eIDAS Regulation in the EU. A short list of document types is excluded, and this guide names them.
This article is general information for business teams, not legal advice. For a specific contract or a regulated document, ask a lawyer admitted in the relevant jurisdiction.
The short answer by region
| Region | Law | What it says | Main conditions |
|---|---|---|---|
| United States, federal | ESIGN Act, 15 U.S.C. 7001 and following sections (2000) | A signature, contract or record cannot be denied legal effect solely because it is electronic | Intent, consumer consent where a consumer is involved, accurate retention |
| United States, state level | UETA (1999), adopted by 49 states, the District of Columbia, Puerto Rico and the US Virgin Islands | An electronic signature satisfies a law that requires a signature | Both parties agreed to transact electronically, attribution, retention |
| New York | Electronic Signatures and Records Act (ESRA) | An electronic signature has the same validity as one signed by hand | Similar in practice to UETA |
| European Union | eIDAS, Regulation (EU) No 910/2014 | An electronic signature cannot be refused as evidence solely because it is electronic | Three levels, simple, advanced and qualified |
The rest of the article explains each row, what a court actually looks at, and what your signing process should record so that a signature holds up when someone questions it.
United States, the ESIGN Act
The Electronic Signatures in Global and National Commerce Act was signed in June 2000 and took effect on October 1 of that year. It is federal law and applies to transactions in interstate and foreign commerce, which covers nearly every commercial contract. Its core rule sits in 15 U.S.C. 7001(a). A signature, contract or other record relating to a transaction may not be denied legal effect, validity or enforceability solely because it is in electronic form.
The word "solely" matters. ESIGN does not make every electronic signature valid. It removes one objection, the objection that the signature is not on paper. Everything else that makes a contract valid still applies, such as offer, acceptance, authority to sign and the absence of fraud.
Consumer consent
When a law requires that information be given to a consumer in writing, ESIGN allows an electronic record only if the consumer has consented. Before consenting, the consumer must be told about the right to receive paper, the right to withdraw consent, what the consent covers and what hardware and software are needed to open the records. The consumer must then consent electronically in a way that reasonably shows they can access the format. Contracts between two businesses do not need this disclosure step, although a consent checkbox costs nothing and removes an argument.
Retention
If a law requires a contract to be kept, an electronic record meets that duty when it accurately reflects the information and stays accessible to everyone entitled to see it, in a form that can be accurately reproduced later. A sealed PDF that every party receives satisfies the idea neatly.
United States, UETA and New York
The Uniform Electronic Transactions Act was approved by the Uniform Law Commission in 1999. It is a model law that each state enacts separately. Forty nine states, the District of Columbia, Puerto Rico and the US Virgin Islands have adopted it. New York has not. New York relies on its own Electronic Signatures and Records Act, which reaches the same practical result for commercial contracts.
UETA defines an electronic signature as an electronic sound, symbol or process attached to or logically associated with a record and executed or adopted by a person with the intent to sign the record. Three points follow from the text.
- Agreement to transact electronically. UETA applies only between parties who have each agreed to conduct the transaction by electronic means. The agreement can be shown by conduct, for instance opening a signing link and completing it.
- Attribution. A signature is attributable to a person if it was the act of that person. That can be shown in any manner, including the security procedure that was used. This is where email verification, one-time codes and IP records earn their place.
- Legal recognition. If a law requires a signature, an electronic signature satisfies the law. If a law requires a record in writing, an electronic record satisfies it.
Where a state has enacted UETA as approved, its version governs alongside ESIGN. For a business sending contracts across state lines, the two laws point in the same direction. Our page on the ESIGN Act and UETA goes through the requirements one by one.
European Union, eIDAS
Regulation (EU) No 910/2014, known as eIDAS, has applied since July 1, 2016 in every member state without needing national transposition. It was amended in 2024 to add the European Digital Identity framework, and the rules on signature levels described here remain in place. Article 25(1) sets the base rule. An electronic signature shall not be denied legal effect or admissibility as evidence in legal proceedings solely on the grounds that it is in electronic form or that it does not meet the requirements for qualified signatures.
eIDAS then describes three levels.
Simple electronic signature
Data in electronic form attached to or logically associated with other electronic data and used by the signatory to sign. A typed name, a drawn signature or a click on a sign button all qualify. It is admissible in court, and the judge weighs the surrounding evidence.
Advanced electronic signature
Article 26 sets four requirements. The signature is uniquely linked to the signatory, it is capable of identifying the signatory, it is created using data that the signatory can use under their sole control with a high level of confidence, and it is linked to the signed data so that any later change is detectable.
Qualified electronic signature
An advanced signature created with a qualified signature creation device and based on a qualified certificate issued by a qualified trust service provider. Under Article 25(2) it has the equivalent legal effect of a handwritten signature, and under Article 25(3) a qualified signature based on a certificate from one member state is recognised in all others.
For most commercial contracts in the EU no particular form is required, so a simple or advanced signature is enough. National law in some member states demands written form or a qualified signature for specific documents, for example certain employment, consumer credit or real estate documents. Check the national rule before you rely on a simple signature for those. The eIDAS page explains which level each plan on our pricing page produces. In brief, every plan produces simple electronic signatures, the Pro flow is designed to meet the advanced requirements, and we do not offer qualified signatures. Our article on electronic vs digital signatures covers how certificates and seals fit in.
Documents that are excluded
ESIGN lists the exceptions in 15 U.S.C. 7003, and UETA has a similar, shorter list. If your document falls in one of these groups, do not assume an electronic signature is enough.
- Wills, codicils and testamentary trusts
- Adoption, divorce and other family law matters
- Most of the Uniform Commercial Code, apart from sales and leases of goods under Articles 2 and 2A
- Court orders, notices and official court documents such as briefs and pleadings
- Notices cancelling utility services, including water, heat and power
- Notices of default, acceleration, repossession, foreclosure or eviction for a primary residence
- Notices cancelling health insurance or life insurance benefits
- Product recall notices and material safety failure notices
- Documents required to accompany the transport of hazardous materials
Some states have since passed their own laws that allow electronic wills or remote notarisation. Those are separate regimes with their own formalities. Notarised documents in general need a notary process, which an ordinary signing tool does not provide. The legal validity page keeps the full list in one place.
What a court actually looks at
Disputes over electronic signatures rarely turn on whether the format is allowed. They turn on proof. The party relying on the contract has to show that this person signed this document. Four questions come up again and again.
Did the signer intend to sign?
A deliberate action helps. Clicking a button labelled Sign after reviewing the document, or drawing a signature in a field, shows intent far better than a name typed at the bottom of an email.
Did the signer agree to do this electronically?
A consent statement that the signer accepts before signing answers this directly. For consumer documents in the US it is required. For business contracts it is good practice.
Can the signature be attributed to the person?
This is where most challenges are won or lost. Evidence includes the email address the invitation went to, a one-time code sent to that inbox or phone, the IP address and browser used, and the time of each step. The more independent facts point to the same person, the harder the signature is to deny.
Is the record the same as the one that was signed?
A document fingerprint recorded before and after signing, plus a tamper-evident seal on the final PDF, shows that nobody changed a page afterwards.
The evidence your process should keep
| Legal requirement | Evidence that supports it |
|---|---|
| Intent to sign | An explicit sign action per signer, recorded with a timestamp |
| Consent to electronic records | A consent statement accepted before signing, logged as its own event |
| Attribution | Signer email, verification by link or one-time code, IP address and browser |
| Integrity | SHA-256 fingerprint of the document before and after, tamper-evident seal |
| Retention | The sealed PDF and certificate delivered to every party and stored |
Good electronic signature software collects all of this without anyone thinking about it. In our product each completed envelope carries a certificate page with every event in UTC, and the events are chained together so that removing one would be visible. The audit trail page shows what each line records.
Signing across borders
When a US company signs with an EU customer, both regimes accept an electronic signature for an ordinary commercial contract. The practical questions are which law governs the contract and whether that law demands a special form for this type of document. State the governing law in the contract, use a process that records identity and integrity, and check form requirements for anything involving employment, real estate, consumer credit or public bodies. The United Kingdom kept the eIDAS signature rules in its domestic law after leaving the EU, so the three levels work the same way there.
Common myths
- A typed name is not a signature. It can be. Both UETA and eIDAS define a signature broadly. The weakness of a typed name is proof, not validity.
- Only a certificate based signature is legal. No. US law is technology neutral, and eIDAS gives legal effect to simple signatures. Certificates add evidence and, at the qualified level in the EU, a legal presumption.
- An electronic signature must look like handwriting. Appearance has no legal weight. The record behind it does.
- Electronic signatures are valid for everything. The exclusions above are real, and some countries require paper or a notary for specific acts.
If you want to see what a complete record looks like, follow our guide to signing a PDF electronically and read the certificate at the end of the signed file.
Frequently asked questions
Is an electronic signature legally binding in all 50 states?
Yes for most business documents. Forty nine states have adopted UETA, New York has its own statute, and the federal ESIGN Act applies nationwide to transactions in interstate commerce. The excluded document types listed above still need paper or a special process.
Does an electronic signature hold up in court?
It is admissible in the US and the EU. Whether it persuades the court depends on evidence that the named person signed and that the document has not changed, which is what an audit trail and a sealed PDF provide.
Do I need a qualified electronic signature in the EU?
Only where a law requires written form that can be met solely by a qualified signature, or where you want the handwritten equivalence of Article 25(2). Most commercial contracts do not need one. Qualified signatures come from qualified trust service providers, and we do not offer them.
Which documents cannot be signed electronically?
Under US law the main groups are wills and testamentary trusts, family law documents, court documents, and certain notices about utilities, housing, insurance and product safety. Other countries have their own lists, often covering real estate transfers and notarial acts.
Is a scanned image of my signature enough?
It can count as an electronic signature, but it is weak evidence because anyone holding the image can paste it. A process that records who signed, when and from where is far easier to defend.