I'm not sure if anyone has already mentioned this, but as far as I know, paying by Paypal doesn't seem to trigger this "foreign/overseas transaction fee and I don't think its anything to do with it having a ABN, head office here, or whatever. My case is that I'm actually using a Paypal UK account as I made an account with Paypal while I was living in the UK, and I can't seem to be able to transfer this to Aussie Paypal without completely changing my email address, something I'm not willing to do, so for the past 7 years I've been using my UK Paypal account with aussie credit cards. I have been paying quite a few local bills recently through PostBillpay with Paypal method, using my Westpac Altitude Black credit card and I don't see an extra fee being charged. So I'm not really sure how Paypal does it, perhaps it detects what currency you are paying in(in this case AUD), and then routs the payment through their Aussie processor(?)