Digital Signatures vs Electronic Signatures: They're Not the Same Thing

In most jurisdictions, yes. In the United States, the Electronic Signatures in Global and National Commerce Act (ESIGN) of 2000 and the Uniform Electronic Transactions Act (UETA) give electronic signatures the same legal weight as handwritten signatures for most contract types. The EU has its own regulation (eIDAS). The legal requirement is intent — both parties need to agree to use electronic signatures and need to intend to be bound. Tools like DocuSign, HelloSign, and Adobe Sign create audit trails specifically to demonstrate intent. Important exceptions: wills, certain real estate transactions, court documents, and some government filings still require handwritten signatures in many jurisdictions.

A digital signature uses public-key cryptography. When you digitally sign a document, a mathematical hash of the document is encrypted with your private key. Anyone with your public key can verify the signature is yours and confirm the document hasn't been modified since signing. Typing your name is just text — any claim that you signed is unverifiable. A drawn signature (like in DocuSign) is better — there's an audit trail — but the security comes from the platform's logging, not from the signature itself. A cryptographic digital signature provides mathematical proof of both identity and document integrity.

For basic e-signatures that are legally binding in most cases, no. DocuSign, HelloSign, and similar services handle authentication through email, SMS, and access codes without requiring certificates. For cryptographic digital signatures that provide mathematical verification, yes — you need a digital certificate from a Certificate Authority. Adobe Acrobat can create self-signed certificates for internal use, or you can purchase certificates from trusted CAs like DigiCert or Comodo for external use. Most businesses and individuals don't need cryptographic digital signatures — e-signatures suffice for contracts, agreements, and standard legal documents.