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A:
Create a sandbox or staging environment with mock UPI transactions across three tiers: low-value, below ₹1 lakh; mid-value, ₹1–2 lakh; and high-value, above ₹2 lakh for eligible accounts. This will help you replicate the new limit tiers defined under the updated NPCI guidelines for travel. In each of these scenarios, verify if your gateway identifies the transaction appropriately as standard or high-value and applies the correct settlement and ledger posting logic.
Next, simulate a partial refund, say ₹20,000 on a booking of ₹1.2 lakh and full refund (the entire amount reversed). In both cases, check whether your gateway sends a Refund API call to the PSP with the correct original UPI reference ID (RRN) and whether the PSP processes it under the same UPI channel. Refunds for high-value UPI transactions post-September 2025 may not process in real time but usually go through a delayed credit window (T+1). Your system should be able to handle asynchronous refund confirmations and post interim entries like Refund Initiated – Pending Credit.
For chargebacks, use your PSP's dispute management sandbox to mock disputed transactions. For instance, test such scenarios as payment credited but booking is cancelled or duplicate charge. Verify your integration appropriately fetches dispute notifications via webhook or scheduled poll, it locks the corresponding ledger entry and posts a temporary reversal to a Chargeback – Under Review account. This avoids double reversals in case the customer’s refund later succeeds.
Also, check your UPI cap compliance logic on refunds. If the original transaction was over the base ₹1 lakh limit for the travel category (and was therefore processed via a high-value corridor), then your gateway should use that exact same high-value corridor in case of refunds - and not the standard corridor. Failure to do so will result in the PSP rejecting the refund or delayed settlement.
Finally, test your reporting and reconciliation layer. Chargebacks and refunds should appear as separate transaction types with an initial UPI reference, refund ID, and settlement date on your ERP or finance dashboard. Run daily reconciliation scripts to make that chargeback reversals pass through your ledger with no residual balances and that reimbursed amounts are appropriately subtracted from your merchant settlement reports.
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