@pennyforum14 wrote:I think you can do it in Paypal in account settings, you can certainly select not to accept credit cards, so that the customer has to actually join Paypal to purchase (never really saw the point in that one).
I looked into this a little while ago, because all off-eBay purchases don't qualify for seller protection unless the buyer logs into a PayPal account. so I wanted to check if there was a way to ensure payments outside of here came from registered accounts.
Turns out the only thing you can do is - basically - "encourage" people to join PP after they use checkout as a guest. 
You also can't select not to accept credit cards, you can select to only accept credit cards, or credit card-backed payments, though, which does eliminate eCheques (this setting is only applicable outside of eBay, it doesn't take effect here), but it also means you can't receive payments from buyers who have PP funds but no CC as a back up funding source (the reason I know this is because a seller I buy from regularly changed their settings to require CC funded payments, and I suddenly had to add one to my account in order for my payment to be accepted, despite having enough funds to cover the purchase several times over).
