Dr Ralph, you may have to click on 'see what doesn't count...'
Pick up our Altitude Rewards Black credit card to earn uncapped Westpac Altitude points as well as enjoy additional rewards benefits. Apply online.
www.westpac.com.au
This appears to be the term:
'Eligible purchases do not include fees, cash, cash equivalent transactions, payments to the Australian Tax Office, BPAY, BPAY equivalent transaction, refunds and balance transfers debited from the card account. The bonus Altitude Points, Qantas Points or Velocity Points will be added to your points balance within 12 weeks once you meet the eligible spend criteria. Existing Westpac customers who currently hold an Earth Classic, Earth Platinum, Earth Platinum Plus, Earth Black, Altitude Classic, Altitude Platinum or Altitude Black credit card, or who have held one in the last 12 months, are not eligible for this offer. Qantas or Velocity Points earned during a statement cycle are added to your Qantas or Velocity Points balance on a monthly basis.'
You are right that 'BPAY equivalent transactions' are not defined. For me the definition of this would flow from how 'BPAY' is understood. According to Wikipedia:
'BPAY is an electronic bill payment system in Australia which enables payments to be made through a financial institution's online, mobile or telephone banking facility to organisations which are registered BPAY billers.'
I take that to mean a third party processer of payments that has a direct arrangement with the business you're making the payment to. So Australia Post could well fit that definition. So to be clear, you ask "Does this mean if one pays a utility or local government rates bill through (for instance) Australia Post BillPay over the phone (or online, or even at the Post,Post Office, the spending would not count?" I say it is likely the answer could be yes it does not count.
I cannot see how paying the bill directly with the merchant could fit the definition of 'BPAY equivalent transactions'.
Given the games that seem to be afoot as discussed in the St George thread recently, I think you are right to be cautious.
Note also that eligible purchases likely only applies to the bonus point offer, not to regular spend, which may attract points.