Got this email today:
As a True Rewards member, you can save 25% plus free shipping when you spend $100 or more just by using the promo code TRUEREWARDS100 when you check out.* All you need to do is use your True Rewards dollars online at Pet.co.nz. Simply enter your True Rewards card detail at checkout, the same way you would for a credit card, between 7 October and 7 November 2020.
If you would prefer to save your True Rewards dollars, you can use your ASB credit or debit card instead to redeem the offer. The choice is yours.
I added products over $100 to my cart and used the code and the discount was applied before it asked me for my credit card, so this code may work with any credit card.
Cheers, worked for me and I didn't use an ASB card.