Starting now, payments you receive will trigger an order to be created in Whiplash. Orders should be visible in Whiplash within a few minutes, and a history of notifications sent can be found on your IPN History page.
Setting Item Names/SKUs
The Item Number in your PayPal Checkout form should match your item SKU in Whiplash.
For each payment you've received in Paypal, there should be a Message ID with a delivery status of Sent. If the delivery status is anything other than Sent or you still have questions, share the contents of the Message with Whiplash Support.