Make sure that you accept Paypal's email updates. Don't rely on the email notification either so its a good idea to check your profile and preferences regularly. They change so often at Paypal its absolutely ridiculous. Shady operation. They are associated with Providian Bank (Visa Card), which is just as shady.
Beware of PayPal
I made a payment via PayPal and just noticed that they took the money out of my checking account instead of my credit card. They made this change without notifying me! Worst thing is that there's absolutely no way to contact them. They don't respond to my emails and they have no phone number to call! This is horrible!