Sign PDF in Power Automate

PDF4me Sign PDF action enables adding signature images to PDF documents in Power Automate with precise positioning and visual control. This flexible signing feature supports scanned signatures, digital signature graphics, and signature stamps with customizable horizontal/vertical alignment, margin control, size adjustment, and transparency settings, perfect for automated document signing, approval marking, and signature application across Microsoft 365 workflows.

Authenticating Your API Request

To access the PDF4me Web API through Power Automate, every request must include proper authentication credentials. Authentication ensures secure communication and validates your identity as an authorized user, enabling seamless integration between your Power Automate flows and PDF4me's powerful PDF signature placement services.

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Key Features

• Image Signature Placement: Add scanned or graphic signatures to PDFs
• Multiple Image Formats: Support JPEG, PNG, GIF, BMP, and TIFF signatures
• Precise Positioning: Control alignment and margins with millimeter accuracy
• Custom Sizing: Set signature width and height independently
• Transparency Control: Adjust signature opacity from 0-100%

Parameters

Complete list of parameters for the Sign PDF action. Configure these parameters to control signature placement.

Important: Parameters marked with an asterisk (***) are required and must be provided for the action to function correctly.

Parameter	Type	Description	Example
File Content***	Binary	Source PDF File Content • Map file content from source action • Supports PDFs from SharePoint, OneDrive, email • Can be dynamically retrieved from flows • Must be valid PDF document	[File Content from Get File]
File Name***	String	PDF Document Name • Specify PDF file name with proper extension • Used for processing identification • Must include .pdf extension • Supports dynamic naming	Contract.pdf
Sign Image***	Binary	Signature Image File • Map signature image content • Supported formats: JPG, PNG, GIF, BMP, TIFF • Can be stored in SharePoint or OneDrive • Transparent PNG recommended for best results	[Signature Image Content]
Pages***	String	Page Selection • Pages where signature should be added • Use numbers: 1,2,3 for specific pages • Use all for all pages • Use first or last for single pages	last
Horizontal Alignment***	Option	Horizontal Position • Left - Left edge of page • Center - Equal distance from left and right • Right - Right edge of page • Controls left-right positioning	Right
Vertical Alignment***	Option	Vertical Position • Top - Top edge of page • Middle - Equal distance from top and bottom • Bottom - Bottom edge of page • Controls up-down positioning	Bottom
Image Width***	Number	Signature Width • Image width in millimeters (mm) • If 0, default width will be used • Controls signature horizontal size • Must provide value	50
Image Height***	Number	Signature Height • Image height in millimeters (mm) • If 0, default height will be used • Controls signature vertical size • Must provide value	20
Horizontal Margin***	Number	Horizontal Offset • Horizontal margin in millimeters (mm) • Gap from left edge if aligned left • Gap from right edge if aligned right • Ignored if centered	10
Vertical Margin***	Number	Vertical Offset • Vertical margin in millimeters (mm) • Gap from top edge if aligned top • Gap from bottom edge if aligned bottom • Ignored if middle aligned	10
Transparency***	Number	Opacity Level • Transparency values from 0 to 100 • 0 for maximum transparency • 100 for maximum opacity • Must provide value	100

Output

The PDF4me Sign PDF action returns comprehensive output data for seamless Power Automate flow integration:

Table

Table View

Response data in a structured table format:

Parameter	Type	Description
File Content	Binary	PDF document with signature image applied
File Name	String	Name of the signed PDF output file

JSON

JSON Response Format

{
  "File Content": "[Binary Content of Signed PDF]",
  "File Name": "Contract_Signed.pdf"
}

Flow Integration

Power Automate Flow Usage

Use signed PDF in subsequent actions:

• Email Distribution: Send signed documents to recipients
• SharePoint Archival: Store signed contracts in libraries
• OneDrive Storage: Save signed documents for records
• Client Delivery: Provide signed documents externally
• Approval Workflows: Complete approval with signature application
• Compliance Storage: Archive signed documents for audit

Workflow Examples

The PDF4me Sign PDF action in Power Automate provides comprehensive workflow templates designed for real-world business scenarios:

Automated Signing

Automated Document Signature Application Workflow

Transform your signing process with automated signature image placement:

Complete Workflow Steps:

1. Trigger: Document approved in approval workflow
2. Get Document: Retrieve approved PDF from SharePoint
3. Get Signer: Identify authorized signer from metadata
4. Get Signature: Fetch signer's signature image from library
5. Apply Signature: Add signature at bottom right of last page
6. Set Size: Apply 50mm x 20mm signature dimensions
7. Email Signed: Send signed document to requestor
8. Archive Signed: Store in signed documents library

Business Benefits:

• Signs 100+ documents monthly automatically
• Eliminates physical signature collection delays
• Reduces signing turnaround from 3 days to 3 minutes
• Maintains consistent signature appearance

Create Flow

Manager Approval

Automated Manager Approval Signature Workflow

Streamline approvals with automated manager signature placement:

Complete Workflow Steps:

1. Trigger: Expense report submitted for approval
2. Get Report: Retrieve expense report PDF
3. Manager Approval: Route to manager for approval decision
4. If Approved: Get manager's signature image
5. Apply Signature: Add signature at bottom with "Approved" stamp
6. Set Transparency: Apply 100% opacity for clear visibility
7. Email Employee: Send approved signed report to employee
8. Post to Accounting: Submit signed report to accounting system

Business Benefits:

• Processes 200+ expense approvals monthly
• Provides visual approval confirmation with signature
• Reduces approval processing time by 70%
• Creates clear audit trail with manager signatures

Create Flow

Bulk Signing

Automated Bulk Document Signing Workflow

Optimize bulk signing with automated signature application to multiple documents:

Complete Workflow Steps:

1. Trigger: Batch of documents ready for signing
2. Get Document List: Retrieve all pending signature documents
3. Get Authority Signature: Fetch authorized signer image
4. Apply to Each: Iterate through each document
5. Add Signature: Apply signature to specified position
6. Add Date Stamp: Include signing date near signature
7. Email Recipients: Send each signed document to recipient
8. Archive Batch: Store all signed documents together

Business Benefits:

• Signs 50+ documents daily in automated batches
• Eliminates repetitive manual signature application
• Reduces bulk signing time from 2 hours to 10 minutes
• Ensures consistent signature placement across all documents

Create Flow

Certificate Signing

Automated Certificate Authority Signing

Enhance certificate issuance with automated authority signature:

Complete Workflow Steps:

1. Trigger: Course completion certificate generated
2. Get Certificate: Retrieve generated certificate PDF
3. Get Authority Signature: Fetch training director signature image
4. Apply Signature: Add signature at designated signature line
5. Set Dimensions: Apply 40mm x 15mm signature size
6. Add Date: Include issuance date near signature
7. Email Student: Send signed certificate to recipient
8. Archive Signed: Store in issued certificates library

Business Benefits:

• Signs 200+ certificates monthly automatically
• Provides authentic appearance with authority signature
• Eliminates physical certificate signing workflow
• Enables instant certificate issuance upon completion

Create Flow

Industry Use Cases & Applications

Legal & Professional Services

Legal & Professional Services Use Cases

• Contract Signing: Add signature images to finalized contracts
• Letter Signing: Apply signatures to official letters
• Document Authentication: Add authority signatures to legal documents
• Approval Marking: Place approval signatures on reviewed documents

Finance & Banking

Finance & Banking Use Cases

• Check Signing: Add authorized signatures to check images
• Document Approval: Apply manager signatures to financial documents
• Letter Authentication: Sign official bank correspondence
• Form Approval: Add approval signatures to completed forms

Healthcare & Medical

Healthcare & Medical Use Cases

• Prescription Signing: Add doctor signatures to prescriptions
• Report Authentication: Sign medical reports and documents
• Approval Forms: Apply signatures to approval forms
• Certificate Signing: Sign medical certificates and clearances

Education & Training

Education & Training Use Cases

• Certificate Signing: Add authority signatures to certificates
• Letter Signing: Sign official school letters
• Document Authentication: Apply signatures to transcripts
• Approval Forms: Sign student approval documents

Get Help

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