title: Workflow: How to Create/Update an Item if it Exists or Does Not
body: <p>I have 2 lists: List A and List B.</p>
  
  <p>My goal is to copy over an item in List A to List B.</p>
  
  <p>In SharePoint Designer 2007, here are the available Workflow commands:</p>
  
  <pre><code>- Create List Item
  - Update List Item
  - Copy List Item
  </code></pre>
  
  <p>Which command creates a list item in List B "if it does not exist", and updates the list item in List B "if it exists"?</p>