How to Add Digital Signature to PDF - Complete Tutorial

Understanding Digital Signatures

Digital signatures provide authentication and integrity for PDF documents. They prove who signed the document and ensure it hasn't been modified.

Types of Electronic Signatures

Simple E-Signature

A basic signature image or typed name. Suitable for internal documents.

Advanced Electronic Signature

Linked to the signer and capable of identifying them. More secure than simple signatures.

Qualified Electronic Signature

The highest level, equivalent to handwritten signatures in most jurisdictions.

How to Sign a PDF

Step 1: Create Your Signature

• •Draw with mouse or touch
• •Type and select a font style
• •Upload an image of your signature

Step 2: Place the Signature

• •Click where you want to sign
• •Resize to fit the signature line
• •Adjust position if needed

Step 3: Save and Download

• •Review the signed document
• •Download the signed PDF
• •Share securely

Legal Considerations

Digital signatures are legally binding in most countries, including:

• •United States (ESIGN Act)
• •European Union (eIDAS Regulation)
• •United Kingdom
• •Canada
• •Australia

Security Features

• •Timestamp: Records when the document was signed
• •Certificate: Verifies the signer's identity
• •Tamper detection: Alerts if document is modified after signing