title: aws sns invoking lambda multiple times
body: <p>My AWS application does not allows duplicates. In my application (fan-out) SNS triggers multiple lambda services. Since SNS follows <strong>at least once</strong> execution, there are chances for triggering same service multiple times.</p>
  <ol>
  <li>If i use SNS FIFO fixes duplicate issue? or any best alternatives?</li>
  <li>With SNS FIFO we can subscribe only SQS, any alternatives to trigger lambda directly?</li>
  </ol>
  <p>My intention is to SNS==&gt; different lambdas (based on input msg type, without duplicates)</p>
  <p>Thanks in advance,
  Anil</p>