PayRec's payment wizard checks for payments that you've already created, to help prevent sending duplicate wires. A message will appear listing out possible duplicate payments, displaying the date they were sent, the Recipient, Invoice and amount entered for the previous wire(s).
This message will appear if the payment matches the following criteria of another payment:
Recipient
Amount/Currency entered
Example: if you've entered 10 USD to send to that recipient within 60 days, the dupe message will appear when you make another attempt. However, if you enter the EUR equivalent, the dupe message will not appear. It's checking for amount and currency entered last.
Created within the past 60 days