Please try search in the Docusign signing resource file guide whether have option to disable or change the html code. the guide for your reference:

https://support.docusign.com/s/document-item?language=en_US&bundleId=docusign-signing-resource-file-guide&topicId=docusign-signing-resource-file-guide.pdf&_LANG=enus

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Hello,

Thank you for your question. The confirmation pop-up that appears after a user clicks the "Finish Later" button is a standard part of the DocuSign signing process and cannot be disabled independently. This feature is in place to ensure signers confirm their intent to save their progress and return later.

While the pop-up itself cannot be hidden, if this functionality is not required for your workflow, you do have the option to disable the "Finish Later" button entirely.

• Access Branding Settings: Navigate to the "Brands" section within the DocuSign eSignature settings.

• Edit the Resource File: For the specific brand being used in the signing session, download the "Signing Resource File." This is an XML file that controls various text and UI elements.

• Modify the DocuSign_FinishLaterAllow Node: Open the XML file and locate the <data name="DocuSign_FinishLaterAllow"> node. By default, its value is true. To hide the button, change the value to false

  <data name="DocuSign_FinishLaterAllow">false</data>

Best,

Dev/API Team