I'm still waiting to hear from support but I found these threads on a couple of other forums. http://support.shopsite.com/forums/viewtopic.php?p=17364 http://community.freshbooks.com/forums/viewtopic.php?id=2147 They both say you can only use one or the other, not both. In order to switch from certificate to signiture you have to remove the certificate and request new creditials which invalidates the certificate. The same holds true going from signiture to certificate. It looks like the only solution so far is to have more than one account with PayPal. It's a hassle because I believe they charge a fee to transfer funds between accounts. The only workaround I can see for that is to tranfer the funds to your bank first and then to your second account. If anyone knows a better way, please let us know.
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