What Is an Electronic Signature?

An electronic signature (often shortened to e-signature) is any electronic mark, sound, or process attached to a document that a person uses with the intent to sign it. That definition is intentionally broad. Typing your name at the bottom of an agreement, clicking an “I agree” button, or drawing your signature on a touchscreen can all count as electronic signatures.

The key idea is not the visual squiggle. It is intent. An electronic signature is proof that a specific person agreed to the contents of a specific document at a specific moment. Modern e-signature platforms wrap that intent in supporting evidence: who signed, when, from what device, and whether the document changed afterward.

People use these two terms interchangeably, but they are not the same thing. The difference is worth understanding because it shows up in vendor marketing and compliance discussions.

An electronic signature is the legal and business concept of signing electronically. A digital signature is a specific technology: a cryptographic method that uses certificates and public-key encryption to bind a signer to a document and detect tampering. Think of it this way. The electronic signature is the act of agreeing. The digital signature is one of the techniques that proves the agreement was not altered.

In practice, a good e-signature platform applies digital-signature cryptography behind the scenes so the finished file is tamper-evident. You get the simplicity of clicking to sign with the security of a cryptographically sealed PDF. To see what that looks like at the file level, read our explainer on how signable PDFs work.

In most everyday business situations, yes. Major frameworks give electronic signatures legal standing as long as the signer intended to sign and agreed to do business electronically. In the United States, the relevant laws are the ESIGN Act and UETA. In the European Union, the governing regulation is eIDAS. These frameworks have made e-signatures a normal, accepted way to close agreements for two decades.

There are sensible limits. A short list of document types, such as certain wills, family-law matters, and specific official notices, may still require a traditional signature depending on jurisdiction. When the stakes are high, stronger identity verification and a complete audit trail matter more.

This is high-level context, not legal advice. For the specifics of how compliance is handled, read our guides on US e-signature compliance and European e-signature compliance. If you handle agreements in volume, our guide to sending signature requests in bulk walks through doing it at scale. When you sign through TurboDocx, the tamper-evident audit trail and ESIGN, UETA, and eIDAS alignment are handled on TurboDocx infrastructure, so you do not have to build that machinery yourself.

Any time you need a documented agreement and want to skip printing, mailing, and scanning. A few common examples:

• Sales contracts and statements of work
• NDAs and vendor agreements
• Offer letters and HR paperwork
• Invoices and payment authorizations
• Consent forms and waivers

Invoices are a great everyday case, where a signed acknowledgment speeds up payment and removes ambiguity. We cover that workflow in detail in our guide to e-signatures for invoices.

As a signer, the process is simple: you open a link, review the document, place your signature, and confirm. The platform records the audit trail and produces a tamper-evident final PDF. No special software, no account required for most signers.

If you build software and want to send documents for signature from your own app, you can use the e-signature API directly, or let an AI coding agent do the wiring. With the TurboDocx Quickstart Skill, you install one skill, describe what you want, and the agent generates a working integration in about 12 minutes. Start by installing the open skills CLI:

npx skills add TurboDocx/quickstart

Create a free account at app.turbodocx.com (your first 5 signatures each month are free), and you are ready to send your first real signature. You can dig into the developer side anytime through the API and SDK or the broader AI engineering guide. If you want the fastest path, jump straight to the TurboDocx Quickstart Skill.

An electronic signature is simply a legally recognized way to show intent to sign a document electronically. A digital signature is the cryptographic technology that often makes it tamper-evident. For nearly every business agreement, a well-implemented e-signature with a proper audit trail is a legally binding signature you can rely on, and it is far faster than paper. When you are ready to send one, you can do it in a browser as a signer or in code as a developer.