when using ipn, it seems that at times the ipn script is called right away and other times it can take up to 10 minutes until a 'Completed' response arrives.
what is the cause of the delay, what are the possible workarounds?
timely responce to this question is greatly appreciated since we are trying to figure out wether or not to flow large volumes of business.
there has some delays, but we have been using one card over and over, and we are thinking that it must have something to do with fraud screen protection and the pay pal screening system more critical evaluating the purchase. the test purchase amounts have been very small (once cent to 5 dollars but final transactions can be up $100 per transaction).
Transaction Completion Time?
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