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URL Callback/Return URL
This callback URL is if the process has been completed merchant transaction paid for by the customer and the merchant already have transaction status notifications. Furthermore, the bank (payment channel) will automatically redirect to the URL callback to inform the merchant that the transaction has been completed. The callback URL provide by the merchant.
Example URL merchants in hit by Faspay
Don't ever update payment status on merchant on this process
Request Parameter URL Notification
Request notification URL parameters are parameters which are sent to the merchant's Faspay inquiry notification URL.