Can one rely on Paypal IPN solely to record purchases?

Question

I\'m setting up a simple \'buy now\' transaction from a website with these major steps:

1. Select product from price list
2. Review selection (amounts, tax etc)

Answer 1

I have not relied solely on IPN to do this, but PayPal will log failures to contact your server if it fails and is supposed to retry later, although I only ever had failures in development and never verified the retry. I just trust them on this one.