What is an electronic signature?
An electronic signature is any electronic mark or process a person uses to show they agree to the contents of a document. That is the definition the US ESIGN Act and the EU eIDAS Regulation both use, and it is deliberately broad and technology-neutral.
In plain terms: if you typed your name to accept an offer letter or clicked "I agree" on a contract, you signed electronically. The law cares about the intent behind the action, not the specific gesture, which is why so many different marks can count.
How does an electronic signature work?
Behind a friendly signing experience, an e-signature platform is busy building a record. When a signer opens a document, the system logs each step - opened, viewed, signed - alongside the time, IP address, and how the signer was verified.
Once everyone has signed, the platform locks the file. Good tools seal it with a cryptographic hash and an embedded signature so any later edit breaks the seal and shows up. The result is a single PDF that carries both the agreement and the proof of how it was signed, which is what makes an electronic signature trustworthy rather than just convenient.
What are the common types of electronic signature?
Electronic signatures show up in more forms than most people expect. The usual ones include:
- Typing your name into a signature field
- Drawing your signature on a trackpad or touchscreen
- Uploading an image of your handwritten signature
- Clicking an "I agree" button after reading the terms
- Replying to an email to confirm acceptance
Each of these can be legally binding under ESIGN and UETA as long as the four requirements below are met. For a fuller breakdown with real examples, see our guide to the types of electronic signatures.
What makes an electronic signature legally binding?
A signature becomes binding when four conditions are present. Capture all four and the signature is enforceable across the US and most of the world.
- Intent. The signer takes a deliberate action meant as their signature.
- Consent. Each party agrees to do business electronically, usually logged as a checkbox.
- Association. The signature is tied to the exact document signed, not a swappable copy.
- Retention. Every party can keep and reproduce the signed record.
The deeper question of where e-signatures are recognized is covered in electronic signature legality.
How is an electronic signature different from a digital signature?
The two terms get mixed up constantly. An electronic signature is the broad legal concept - any electronic mark of intent. A digital signature is one specific technology that uses public-key cryptography, hashing, and certificates to prove a document has not changed since signing.
Every digital signature is an electronic signature, but not the reverse. Document eSign gives you the easy signing experience of an electronic signature while sealing each completed PDF with a digital signature (PAdES-B, SHA-256, and a trusted timestamp) under the hood. For the full contrast, see digital vs electronic signature.
How do you use an electronic signature?
Sending a document for signature takes about a minute. Upload a PDF or Word file, drag signature, date, and text fields onto it, add your recipients, and send. Each signer gets a secure link, signs in their browser with no account or install, and everyone receives the sealed copy with a certificate of completion.
Document eSign does all of this on a free-forever plan with unlimited documents and an audit trail on every envelope. You can sign a Word document or a PDF the same way, in the same flow.
Frequently asked questions
What is an electronic signature in simple terms?
An electronic signature is any electronic action that shows a person agrees to a document - typing a name, drawing a mark, or clicking a clearly labeled button. It is the digital equivalent of signing on paper, and under US and EU law it carries the same legal weight.
Is a typed name an electronic signature?
Yes. A typed name in a signature field is a valid electronic signature when the signer intends it as their signature and the surrounding record captures consent and the document. The form of the mark matters far less than the evidence of intent.
Is an electronic signature the same as a digital signature?
Not quite. Electronic signature is the broad legal concept; a digital signature is one technical method that uses cryptography to seal the document. Every digital signature is an electronic signature, but not every electronic signature uses cryptography.
Do electronic signatures hold up legally?
Yes. The US ESIGN Act and UETA, and the EU eIDAS Regulation, all give electronic signatures the same standing as handwritten ones for most agreements. A signature is binding when intent, consent, association with the record, and retention are present.
How do I add an electronic signature to a document?
Upload the file to an e-signature tool, place signature and date fields, and send it for signing by email link. The signer opens the link in a browser, signs, and everyone receives a sealed copy with an audit trail. No account or install is needed for the signer.