I've seen this in the Westpac Rewards and Offers page when I logged in into my Westpac account.
I got:
Lindt: Get $5 cashback when you spend $10 or more at Lindt. Experience Lindt and what makes us unique, from our passion to our artistry, discover how these elements combine to create perfect Lindt chocolate.
Spend $10 or more in 1 transaction on your Westpac Credit Card. Only 1 cashback offer per merchant, per cardholder and will be paid into your account within approximately 7 days. Offer is valid in-store only.
Your offer is valid from 08 Jul 2019 until 11 Aug 2019.
Myer: Get $15 cashback when you spend $100 or more. Ends on 05 Aug 2019.
FootyFanDirect: Get $20 cashback when you spend $150 or more. Ends on 04 Aug 2019.
Robins Kitchen: Get $15 cashback when you spend $100 or more. Ends on 18 Aug 2019.
Menulog: Get $15 cashback when you spend $50 or more. Ends on 21 Jul 2019.
Got Lindt spend $30 get $10 cashback. Ends 11 August 2019.
Also got MYER spend $100 get $15 Ends 5 August 2019.