To check your Blackmores gift card balance, go to Blackmores Purchasing FAQs page. Next scroll down to Promotional voucher codes section and click on I have a voucher code. How do I use it? to check your balance. You can check Blackmores gift card balance online on our website, or call Blackmores at 1800 803 760. You can also visit any Blackmores store and inquire a cashier to check the balance for you.