Paypal IPN: what if the buyer didn't click the return link after payment?

From what I understand a开发者_Go百科bout integration with paypal - we rely on the IPN to process our the db injection like creating the order, recording the transaction into our db, etc.

In order to receive the IPN data from paypal requires the buyers to click the return link after his/ her payment.

But what if the buyer didn't click the return link after payment? The buyer will still see their cart with the items in it if they come straight back to our shopping site without clicking the return link, but they have already paid on paypal.

I can't think of any idea to solve this possibility that might happen, do you have any solution?

In order to receive the IPN data from paypal requires the buyers to click the return link after his/ her payment.

Your assumption is wrong, PayPal sends you the IPN as soon as the payment is made.