Guides2026-01-24

The Legal Validity of PDF Signatures: What You Need to Know

By Legal Tech Advisor

In the digital age, signing a piece of paper and scanning it back is becoming obsolete. However, many professionals are still unsure about the legal standing of a signature added via an online PDF editor. Understanding the laws like ESIGN and eIDAS is critical for business compliance.

Electronic vs. Digital Signatures

An electronic signature is a broad term that includes a typed name, a scanned image of a handwritten signature, or a mark made on a touch screen. A digital signature is a specific type of electronic signature that uses cryptographic keys to verify the document's integrity.

Is a PDF Signature Binding?

In most jurisdictions, including the US, UK, and EU, electronic signatures are legally binding for the vast majority of business and personal contracts. As long as there is intent to sign and an audit trail (or proof of the process), the signature holds up in court.

Best Practices for Signing PDFs Online:

  • Privacy First: Use a tool like OurPDFEditor so your contract never leaves your computer during the signing process.
  • Clear Intent: Ensure the signature is placed clearly in the designated area.
  • Keep Originals: Always retain the original PDF alongside the signed version for version control.

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