please reference this document:

https://support.docusign.com/s/document-item?language=en_US&bundleId=oyh1657217277873&topicId=quo1715176441308.html&_LANG=enus

Retrieve is for download the envelope documents from their account. It can’t extract Signature image from the completed PDF. So why you need this signature image?

FreeLink/甫连信息
DocuSign Partner | Partner Profile
The only DocuSign Partner globally certified as both a Certified eSignature Administrator and eSignature Technical Consultant
DocuSign 2024 APAC Reseller Growth Partner of the Year
Ranked #1 in the OG All Star category in DocuSign Community Wrapped 2024
DocuSign Community Leaderboard Top 5 contributor
Expertise in DocuSign integrations with on-premises systems for leading enterprises across various industries
 Connect with me on LinkedIn: https://www.linkedin.com/in/gehengfeng/

Hello ​@Emad Radwan,

In addition, the DocuSign Retrieve Application is designed to help with downloading multiple documents efficiently. It can be configured to automate the retrieval of completed documents, making the process much easier and faster than manually downloading each document through the UI.

Ma. Cassandra | Docusign Community Moderator
Mark as “Best Answer” if this helped clarify things.