Auto top-up works based on two settings selected by you:
Threshold amount: The wallet balance that triggers auto top-up.
Top-up amount: The amount that will be added to your wallet once the threshold is reached.
Example:
If your threshold is 20 SGD and your top-up amount is 25 SGD, then whenever your balance falls below 20 SGD, we will attempt to top up 25 SGD automatically.