Interesting note on my latest Citibank Signature Statement; issued 4/9 for period ending 3/9:
Important information about your credit card account (Account)
This notice of variation is provided to you with your September 2013 statement of Account and sets out a change to your terms and conditions. Please read it carefully and retain it for your records.
Changes to Citibank Rewards and Citibank Qantas Rewards Program Terms and Conditions
Effective 1 November 2013, the definition of Eligible Transaction shalf be replaced by:
Eligible Transaction means any Retail Purchase which is made by the use of a Card or any other means permitted by Citibank, excluding (but not limited to) transactions by way of Cash Advances, Balance Transfers, Special Promotions, fees, purchases of foreign currency and travellers cheques, foreign exchange and ATM/ Bank charges, interest charges, finance charges, government charges, payments to the Australian Taxation Office, insurance charges, payments
to Citibank loan accounts (mortgage etc), purchases in excess of limits on the Account. transactions made in operating a business and if the Account is more than $10,000 in credit only, all other transactions.
Please do not hesitate to contact us on 132484 if you have any questions regarding this notice and we will be happy to assist you 24 hours a day, seven days a week.
I look the liberty of underlining the "payments to the Australian Taxation Office" section.