title: What is the safest way to get payments in intervals
body: <p>I am calling the payments api in intervals and specifying the begin_date with the last date/time from the previous call. But it appears that I am periodically missing a payment from what is returned. The payment exists and is returned correctly if I do a full query, but for some reason I don't get it when calling in intervals.
  What is the safest way to ensure that I pick up all payments since the last request? Should I always specify an end_date, or perhaps adjust the begin_date back a few seconds?
  Any help would be greatly appreciated!</p>
  
  <p>Mie</p>