title: What is the most optimized way to include one set of DFP tags as a creative into another DFP account?
body: <p>I have implemented dfp ad code across our site using what I'll call account A.</p>
  
  <p>We have a contract with account B to serve ads with 100% fill on a couple of placements on our site.</p>
  
  <p>Ad network B has provided us with a DFP account for the placements they are filling for us.  I can generate tags etc.</p>
  
  <p>The way I have it set up now is that in Account A. I have created an order and line items for the units we want to fill with B's ads.  For the creative I am currently using the passback tags that I can generate in Account B and adding them to A as a third party creative.</p>
  
  <pre><code>&lt;script type='text/javascript' src='http://www.googletagservices.com/tag/js/gpt.js'&gt;
    googletag.pubads().definePassback('/XXXXX/XX/XX/XXX', [[1, 1], [320, 50], [728, 90], [160, 600], [300, 250]]).display();
  &lt;/script&gt;
  </code></pre>
  
  <p>Ads are being served, but the fill rate and # of impressions when serving B via A is down about 40% than when I put B's code directly into the page.  I suppose that could be a latency drop since I'm making an extra server trip, but that seems like an awfully large penalty.</p>
  
  <p>What I'm wondering is whether this is the correct way to handle this.  I see the option for "DoubleClick Tag" creative in A, but I can't see how to generate or build that tag in B's interface.  Is there a standard format for "DoubleClick Tag" creatives that I would just build from what I know in B.</p>
  
  <p>Of if there is a better way to do this, I'd love to hear it.</p>