PDF Editing Issues

How to Let Signers Attach Files in Adobe Acrobat

John WilsonJohn Wilson Oct 28, 2026 869 views

Question details

The user wants to know how to enable recipients to attach supporting files or images when completing a document sent for signature.

How to Let Signers Attach Files in Adobe Acrobat
Product
Adobe Acrobat
Device & OS
not provided
Scenario
Preparing a document for e-signature and needing the recipient to upload additional documents during the signing process.
Observed behavior
The sender needs to locate and insert a specific field in the document authoring mode that permits the signer to attach files.
Before you start

Ensure you have an active Adobe Acrobat Pro or Adobe Sign subscription that includes advanced e-signature authoring tools, and that your document is ready for routing.

Solution 1Recommended

Add a File-Attachment Field in the Send for Signature Workflow

Use Acrobat's authoring environment to insert a dedicated attachment block, allowing recipients to upload files easily when they receive the document.

When sending documents that require supporting evidence (like ID cards or certifications), you must add a file-attachment field before sending. The recipient will see this as a clickable upload area during their signing step.

1
Open the Send for Signature Tool

Launch Adobe Acrobat, open the PDF you want to send, and select the 'Request e-signatures' or 'Send for Signature' tool from the right-hand tools pane.

2
Enter Recipient Details

Add the email address of your signer. Before sending, click on 'Specify Where to Sign' or 'More Options' to enter the document authoring mode.

3
Locate Field Options

In the authoring environment, look at the field options available in the right-hand pane under the data fields or more fields section.

4
Insert the File Attachment Field

Select the 'File Attachment' field, then drag and drop it onto the desired location in your document. You can resize it to fit your layout.

5
Send the Document

Once all signature and attachment fields are placed, click 'Send'. The recipient will now be prompted to upload their permitted files or images into that specific field when completing the form.

Add a File-Attachment Field in the Send for Signature Workflow
File Types: Signers can typically attach standard image files (like JPG and PNG) and PDF documents. Executable files are restricted for security.
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Frequently Asked Questions

Can signers attach multiple files in a single Adobe Acrobat document?

Yes, but you must add a separate file-attachment field for each document you want the recipient to upload. A single field generally accepts only one file.

What file formats can a recipient attach during the signing process?

Recipients can attach most standard document and image formats, such as PDF, JPG, PNG, and GIF. For security reasons, executable files (.exe) and certain scripts are not permitted.

Is the file-attachment field feature available in the free Acrobat Reader?

Adding a file-attachment field for routing requires a paid Adobe Acrobat Pro or Adobe Sign account. However, the recipient can use the free Acrobat Reader or a web browser to upload their files and complete the signature process.

Why can't I see the file-attachment option in the right-hand pane?

This usually happens if you are using the standard 'Fill & Sign' tool instead of the 'Request e-signatures' authoring mode. Ensure you have clicked 'Specify Where to Sign' to access advanced field options.