title: Reuse/alter a DocuSign envelope, to update its document PDF, once the envelope is In Process
body: <p>We need to be able to handle a scenario where the document PDF needs to be updated and resent, after the envelope is In Process.  Do we always need to create a new envelope or can we reuse the current envelope ID?</p>
  
  <p>Our process goes roughly like this:</p>
  
  <ol>
  <li><p>A PDF document is generated (not using a DocuSign template).</p></li>
  <li><p>We create an envelope for the document PDF.</p></li>
  <li><p>The first signer (our employee) signs the document (using an embedded signing page).</p></li>
  <li><p>The other signers sign the document (also using an embedded signing page).</p></li>
  </ol>
  
  <p>Firstly, we want to know if we're forced to incur another "sent" envelope (i.e. we're billed) every time we want to update a document PDF.  Secondly, we're looking for a clean way to implement updates, without the need to manage multiple envelopes.</p>