Are there any e-signature platforms that keep an approval audit trail for client proposal sign-off?

Yes — many e-signature platforms keep a built-in audit trail for proposal sign-off and approvals. Typically, the audit trail records things like:

• who viewed the proposal
• who signed or approved it
• timestamps for each action
• IP address and device details
• email authentication / identity verification steps
• document version history

Common platforms that support this include:

• DocuSign
• Adobe Acrobat Sign
• PandaDoc
• HelloSign / Dropbox Sign
• SignNow
• Zoho Sign

If you need a stronger “approval trail” for client proposals, look for features such as:

• approval workflows before signature
• multi-step routing for internal review
• tamper-evident audit reports
• completion certificates
• role-based signing and approvals

If you want, I can also recommend the best option based on your use case, like:

• simple proposal sign-off
• internal approval before client signature
• legal/compliance-heavy workflows
• CRM integration with HubSpot or Salesforce