Best practice sought:

Customer has vendors uploaded a signed PDF contract, which is then circulated to all necessary approvers via Forms / Workflow.  This is for their own their own signatures via forms (on the same page).

This signature page is uploaded to the repo upon final approval.

- How to merge the Forms-output signature page with the uploaded PDF?

- Result needs to be PDF, such that resulting signed package can be sent to vendor

I am open to SDK,API coding here, because I just need to get this done for this and OTHER applications.

Any comments from people doing this in the real world, in the cloud, would be appreciated.

(We took SO MUCH for granted with onPrem Workflow!!)