Pending and delayed confirmation
Do not assume the success redirect and webhook arrive in a convenient order. Show a clear pending state, refresh status safely and explain what the user should expect.
Avoid presenting another purchase button while the original transaction may still complete.
- Delay the webhook
- Refresh and revisit the confirmation URL
- Close the tab before redirect
- Verify status from another device
Failure without lost context
When checkout fails or requires another action, preserve the selected plan and return the user to a useful recovery point.
Error messages should distinguish a declined payment from a technical problem without exposing provider internals.
- Decline a test payment
- Interrupt the network
- Expire the checkout session
- Return from authentication or 3DS failure
Subscription changes
Explain when a plan change takes effect, how proration works and which capabilities change immediately. Cancellation should communicate both the end date and the path to reactivate.
Test the interface against the provider state rather than a locally assumed state.
- Upgrade and downgrade
- Cancel at period end
- Reactivate before expiry
- Fail the next renewal
- Check access at each transition
Refunds, disputes and support
A refunded payment should update access according to your policy and produce a customer-visible explanation. Support needs transaction references without exposing sensitive card data.
Design these states before the first real dispute forces an improvised manual process.
- Issue a full and partial refund
- Open a test dispute when supported
- Verify receipt and invoice access
- Confirm support can locate the transaction
Authoritative references
Have experienced reviewers test the real application.
AuditFlare validates findings across your product, code and business logic, then explains what to fix.
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