PayPal PDT/Autoreturn Identity Token reset

I am a paid s2Member user. I use the PayPal Pro Payments option in my website.

It seems like the token stops working after a while. At first I thought it was just a random glitch, but it keeps happening. Every month or so we get a customer complaining that they can’t checkout using PayPal guest checkout with a credit card.

When I test it, regular checkout works, checkout with PayPal account works, but PayPal guest checkout with a credit card doesn’t work.

I go to s2Member > PayPal Options > PayPal PDT/Auto-Return Integration

and follow the directions, replacing the PayPal PDT Identity token with what is in PayPal.

Then it works again. Until we get another complaint a month or so later. This has happened three times now.

Do you know what is causing this and how we can avoid it?

Thanks!

Since I fixed it a few days ago, it has already stopped working again. I fixed it again by copying the PayPal PDT Identity token from paypal to my s2member installation. What’s going on?