If you’ve ever Googled “are e-signatures legal,” you’ve probably landed on a page that quotes a bunch of statutes without telling you what any of it means in practice. Here’s the short version: yes, e-signatures are legal in almost every situation you’ll encounter as a business. But there are exceptions, and the rules vary depending on where your signer is located.
The ESIGN Act (United States, federal)
The Electronic Signatures in Global and National Commerce Act was signed into law in 2000. It establishes that electronic signatures and electronic records carry the same legal weight as handwritten signatures and paper documents in interstate and foreign commerce.
The key requirements are straightforward:
- The signer must intend to sign. Clicking “I agree” counts. Accidentally tapping a button does not.
- The signer must consent to doing business electronically. Most platforms handle this with a disclosure before the signing process begins.
- The electronic record must be retained and reproducible. In other words, you need to keep a copy of the signed document and be able to pull it up later.
ESIGN doesn’t prescribe a specific technology. A typed name in an email can technically qualify. But in practice, you want a platform that captures identity verification, timestamps, and an audit trail—because if someone challenges the signature, you’ll need evidence that the right person signed at the right time.
UETA (state-level)
The Uniform Electronic Transactions Act is a model law that 47 states have adopted (plus DC and the U.S. Virgin Islands). It covers intrastate transactions—deals that happen within a single state. New York, Illinois, and Washington have their own versions with slightly different language, but the principles are the same.
UETA works alongside ESIGN. If your transaction is within one state, UETA applies. If it crosses state lines, ESIGN applies. In practice, most e-signature platforms satisfy both simultaneously, so you don’t need to think about which one governs your specific transaction.
eIDAS (European Union)
If you do business with anyone in the EU, eIDAS is the regulation that matters. It defines three tiers of electronic signatures:
- Simple electronic signature (SES): Any data in electronic form attached to other electronic data. This is the broadest category and covers most everyday business signatures.
- Advanced electronic signature (AES): Must be uniquely linked to the signer, capable of identifying the signer, and created using data under the signer’s sole control. Most e-signature platforms that verify identity meet this standard.
- Qualified electronic signature (QES): Created using a qualified signature creation device and based on a qualified certificate issued by a trust service provider. This is the equivalent of a handwritten signature under EU law and is required for certain government filings and real estate transfers in some member states.
For typical B2B contracts, SES or AES is sufficient. You only need QES for specific regulated scenarios, and those vary by country.
Documents that still need wet ink
Not everything can be e-signed. Under U.S. law, these categories are generally excluded from ESIGN and UETA:
- Wills, codicils, and testamentary trusts
- Adoption and divorce papers
- Court orders and notices
- Notices of cancellation or termination of utility services
- Notices of default, repossession, foreclosure, or eviction
- Product recall notices affecting health or safety
- Documents required to accompany hazardous materials transport
Some states add their own exclusions. For example, certain states require notarized wet-ink signatures for real estate deeds, though remote online notarization (RON) is changing this rapidly.
Practical compliance tips
If you’re sending standard business documents—contracts, NDAs, offer letters, invoices, purchase orders—you’re on solid legal ground with e-signatures. Here’s how to keep it clean:
- Capture consent. Show signers a statement that they agree to sign electronically before they begin. Store that consent record.
- Keep audit trails. Log who signed, when, from what IP address, and on what device. This is your evidence if someone disputes a signature.
- Store documents securely. ESIGN requires that electronic records be “accurately preserved and accessible” for the legally required retention period.
- Provide an opt-out. Under ESIGN, signers have the right to receive paper documents instead. In practice, very few people ask for this, but you need to offer it.
- Know your exceptions. If you’re in real estate, family law, or government services, check your state’s specific rules before assuming e-signatures are accepted.
The bottom line
E-signature law hasn’t changed much in the past few years, which is actually a good thing—it means the legal framework is stable and well-understood. For the vast majority of business documents, electronic signatures are just as enforceable as pen on paper. The important part isn’t which statute applies; it’s whether you have a clear audit trail that proves the right person signed the right document at the right time.
If your e-signature tool gives you timestamped logs, identity verification, and a certificate of completion, you’re in good shape.