Electronic vs Digital Signatures: What's the Difference?

People use “electronic signature” and “digital signature” as if they mean the same thing. They don’t, and the difference matters when someone asks you to “sign digitally”. Here’s a plain-English comparison.

Electronic signature

An electronic signature is any electronic mark you use to show you agree to a document. It can be:

• an image of your handwritten signature placed on a PDF,
• your typed name,
• a click on an “I agree” button, or
• a signature drawn on a touchscreen.

What makes it a signature is your intent to sign and the link between you and the document. Most countries’ laws — the ESIGN Act and UETA in the US, eIDAS in the EU, the Electronic Transactions Acts in Australia, and similar laws in the UK, Canada and India — say an electronic signature can’t be refused just because it’s electronic.

This is what our Sign PDF tool creates.

Digital signature

A digital signature is a specific technology: it uses public-key cryptography and a digital certificate to:

• prove which certificate signed the document, and
• detect any change made to the document after signing.

When you open a digitally signed PDF in Adobe Reader, you’ll see a banner saying whether the signature is valid and whether the document has been modified. Digital certificates are issued by certificate authorities, often after identity checks.

Side-by-side

	Electronic signature	Digital signature
What it is	Any electronic mark showing intent	A cryptographic seal using a certificate
Proves identity	Through surrounding evidence (emails, logins)	Through the certificate
Detects later changes	No	Yes
Cost	Usually free	Often requires a paid certificate or service
Typical uses	Contracts, leases, NDAs, HR forms, permission slips	Government filings, regulated industries, high-value contracts

Which one do you need?

For most everyday documents, an electronic signature is enough. Leases, freelance contracts, NDAs, consent forms, quotes and many business agreements are routinely signed electronically.

You may need a digital or “advanced/qualified” signature when:

• a government portal or regulator requires a certificate-based signature,
• you’re in a regulated industry with specific signing rules,
• the other party’s policy requires one, or
• in the EU, a “qualified electronic signature” is required for certain legal acts.

Some documents need ink or witnesses regardless of technology — commonly wills, some powers of attorney and certain property documents, depending on where you live.

Making electronic signatures stronger

If you’re signing electronically, a few habits make your signature easier to rely on later:

• Keep the email or message thread where the document was sent and returned.
• Keep a copy of the exact signed PDF.
• Flatten the PDF after signing so the signature can’t be moved — our tool does this automatically.
• Agree in the contract that electronic signatures are valid (our legal templates include this).

Summary

Electronic signatures are about intent; digital signatures are about cryptographic proof. Most of the time you only need the first. When someone asks you to “sign digitally”, ask whether a signed PDF is fine — it usually is.