Overview
This article explains what an electronic signature really is, how it differs from a digital signature, and when each one is legally and practically appropriate. You will see which laws give e-signatures legal force, where they are most commonly used, and how to choose the right signing platform - from mainstream tools like Adobe Sign and DocuSign to privacy-focused options such as Agrello. By the end, you will know exactly when a simple e-signature is enough and when stronger cryptographic protection is required.
What is an Electronic Signature?
An electronic signature is any electronic symbol, sound, or process that a person attaches to a document to show intent to sign.
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Clicking an “I accept” button
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Typing your name at the end of an email contract
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Drawing your handwritten signature with a finger on a phone screen
All three examples count. What matters is the signer’s intent and the ability to link the signatory to the document.
A quick note on terminology. The NIST glossary observes there is no single agreed definition of “electronic signature” and even recommends the term “digital signature” for consistency. Regulators, however, still use “electronic signature” widely, so you will see both terms in daily business.
At its core, then, an electronic signature is a broad, technology-agnostic concept focused on intent rather than on a specific technical process.
If you want a deeper dive on the foundations, check the Electronic Signature 101 guide.
Electronic Signature: Simple Legal Definition
An electronic signature is a legally recognized way to express intent to sign a document using any electronic method - such as a typed name, a drawn signature, or a click - provided the signer can be identified and the record can be kept.
Electronic vs. Digital Signature
Electronic and digital signatures sound interchangeable, yet there is a key difference. Digital signatures are a subset of electronic signatures that use public-key cryptography. The signature is created with a private key, then verified with a public key. This math provides:
Because of those guarantees, many jurisdictions consider digital signatures the “advanced” or “qualified” tier of e-signing.
Electronic signatures, in contrast, can be as simple as clicking a box. They are easier to use but may require extra evidence - like an email audit trail - to meet court scrutiny.
If you’re interested in the technical underpinnings, discover more in this explanation of creating digital signatures.
In practice, most modern platforms, including Agrello, wrap the advanced cryptography of digital signatures in a slick interface, giving you both ease and higher assurance.
All digital signatures are electronic signatures, but not every electronic signature is a digital one. Choose the level that matches your risk.
