Future StackPayment integration is one of the areas of a store build where cutting corners has real consequences, both financial and reputational. Whether the gateway is Stripe, Razorpay or another provider, a handful of checks before going live make the difference between a smooth launch and a stressful one.
The first is testing the full failure path, not just the happy path. It's easy to test that a successful payment works; it's far more important to test what happens when a card is declined, when a payment times out, or when a customer's connection drops mid-checkout. Customers need a clear, non-alarming message and a way to try again without being charged twice.
The second is making sure refunds and partial refunds work correctly from day one, not as an afterthought once the first refund request comes in. This includes checking that refunds correctly update order status and inventory, rather than requiring manual reconciliation later.
The third is currency and fee transparency. Gateway fees, currency conversion charges and any platform-side transaction fees should all be understood and accounted for in pricing before launch, not discovered in the first month's statement.
Finally, security compliance is non-negotiable — using a gateway's hosted checkout or properly tokenised card fields means sensitive card details never touch your own servers, which keeps a store out of the most demanding parts of PCI compliance. Skipping this in favour of a custom card form is rarely worth the added risk and maintenance burden it creates.
Running through this checklist before launch takes an afternoon and prevents the kind of payment issue that, if discovered by a customer instead of caught in testing, does real damage to trust in a store that may have taken months to build otherwise. Treating this checklist as a standard part of launch, rather than an afterthought once the rest of the store feels finished, is one of the cheapest forms of insurance available on any e-commerce project.