Instruction
Once a purchase is created, acheckout_url will be provided to redirect the buyer to the payment page. To pre-select a specific payment method on the default payment page — so the customer’s chosen method is highlighted first while the other methods remain visible — append the following parameter to the URL:
?active={payment_method}
{payment_method} must be one of the method names returned by GET /payment_methods/. Common values include dnqr, duitnow_qr, fpx, fpx_b2b1, razer_grabpay, and razer_tng.
This is different from
?preferred={payment_method}, which skips the default payment page entirely and forces the customer straight into the chosen method’s checkout. Use ?active= when you want to suggest a method but still let the customer pick a different one.