In the Wallet section of your dashboard, you'll notice some information about wallet balances.
From time to time, or as you redeem promo codes, special offers or other parking credit, you'll see either a primary credit, centre credit or both (lucky you!).
Primary Credit means you can use this amount at any admyt enabled location. This will be drawn from first before your payment method is charged.
Centre Credit means you have some bonus parking at a specific mall. This can only be used at that particular mall and will be drawn from first before any primary credit.
If you're confused, its best to remember the following payment hierarchy.
Centre credit > Primary Credit > Your Card