Now, you can open paypal.com, log in using your username/password (if you have to), then click on either "Profile" or "Edit Profile", now under "Profile Summary" there's "Account Information", "Financial Information" and "Selling Preferences" - under "Financial Information" you'll find a link "Pay List", click it. This is a list of open authorizations to debt your PayPal account, click on the Register.com Inc one. The "Billing Limit" is $1000 - whoooo I sure wouldn't want to have that active if they made a billing error! So just click "Cancel", and you're done! Remember to do this *after* paying for any services you want from register.com and not before, but this will ensure your paypal account can't be further billed by register.com!