Automation & AI · Signatures
One is a legal category, the other is a security technology. Here is how they differ, what US law says, and which your business needs.
E-signature is the legal concept
Digital signature is the cryptography
Most contracts need only an e-signature
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An electronic signature (e-signature) is any electronic sign of intent to agree: a typed name, a drawn signature, a checked box or a click on “I agree”. A digital signature is a specific technology that uses cryptography and a certificate to prove who signed and that the document has not changed since.
In the United States, the federal ESIGN Act and state laws based on the Uniform Electronic Transactions Act (UETA) make e-signatures legally valid for most business documents. Many e-signature platforms use digital signature technology behind the scenes to seal the finished document. For everyday contracts, an e-signature platform with a solid audit trail is enough. This is general information, not legal advice.
The federal Electronic Signatures in Global and National Commerce Act of 2000 says a signature, contract or record in interstate or foreign commerce may not be denied legal effect solely because it is electronic. It 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. Notice that the definition is technology-neutral: it does not require cryptography.
ESIGN adds consumer protections. Where a law requires information to be given to a consumer in writing, the business must get the consumer’s consent to electronic records after giving specific disclosures, such as how to withdraw consent and get paper copies.
UETA is a model law from the Uniform Law Commission. It has been adopted by nearly every state, plus the District of Columbia and US territories, and gives electronic records and signatures the same effect as paper within state law. New York uses its own Electronic Signatures and Records Act instead.
ESIGN lists exceptions where its rules do not apply, and state law may have its own. Section 7003 excludes, among others:
Some documents also need notarization or witnesses, which have their own rules. Many states now allow remote online notarization, but requirements vary. Check with counsel before switching any document type on this list.
A digital signature uses public key cryptography, the method standardized for US federal use in NIST’s Digital Signature Standard (FIPS 186-5).
The result is strong evidence of who signed and proof the document is intact. PDF readers show a visible validity check for certificate-based signatures.
Thinking about moving signatures and approvals online? It is often part of a bigger paperwork automation opportunity. Our free Technology Health Assessment takes about 30 minutes of data collection. The next day you get a plain-language report rating your IT operations, cybersecurity, automation and AI opportunities, with a short list of next steps in order. It is yours to keep, with no obligation. Book your assessment.
A legal concept. Any electronic mark showing intent to sign. Valid for most business documents under ESIGN and UETA. Evidence comes from the platform’s audit trail: emails, timestamps, IP addresses and verification steps.
A technology. A cryptographic seal tied to a certificate. Proves the signer’s identity, to the level the certificate authority verified, and detects any change to the document. Required by some government agencies, regulated industries and foreign jurisdictions.
They are not opposites. A typical e-signature platform captures intent with a simple click and then applies a digital certificate to the completed PDF, so the record is tamper-evident.
If a document is likely to be disputed, choose the option that leaves the strongest evidence trail, and keep the platform’s completion certificate with the signed file.
A practical decision rule:
The biggest gain is not the signature itself. It is what happens around it: generating the document from your CRM, sending it automatically, filing the signed copy to the right client folder and updating the record. That is integration and automation work, which our automation and practical AI and systems integration teams handle.
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In the United States, the ESIGN Act and state UETA laws generally give electronic signatures the same legal effect as handwritten ones for most business documents, with listed exceptions. This is general information, so confirm specific documents with counsel.
An e-signature is any electronic indication of intent to sign. A digital signature is a cryptographic method using a certificate that verifies the signer and shows whether the document changed.
It can be. ESIGN defines an electronic signature broadly, so a typed name adopted with intent to sign can qualify. Evidence of who typed it and when, such as an audit trail, matters if it is challenged.
Exceptions include wills and testamentary trusts, family law matters, court documents, certain utility, foreclosure, eviction and insurance cancellation notices, product recall notices and hazardous materials documents. State law may differ.
Not for most US business contracts. A reputable e-signature platform with an audit trail is usually enough. Some government, regulated and international uses require certificate-based signatures.
