WooCommerce Payment Gateway Integration Checklist for Launch and Post-Launch

Introduction

Table of Contents

Introduction
Table of contents
1. Pre-integration
2. Plugin and credentials
3. Checkout UX
4. Functional tests (sandbox)
5. Subscriptions and renewals (if used)
6. Go-live
7. Post-launch monitoring
Need implementation help?
Related reading

A reliable WooCommerce payment integration is less about picking a famous payment gateway brand and more about matching processor capabilities to your markets, then proving—with tests—that checkout, webhooks, and refunds behave under stress.

Use this checklist before launch and again after major WooCommerce, PHP, Blocks checkout, or gateway plugin updates. Pair it with how to evaluate payment gateway plugins and payment gateway plugin vs custom integration when you are still selecting software.

Who this is for: Store owners, agencies, and developers who want fewer “orders stuck on pending” incidents and cleaner finance reconciliation.

Pre-integration
Plugin and credentials
Checkout UX
Functional tests (sandbox)
Subscriptions and renewals
Go-live
Post-launch monitoring

1. Pre-integration

Why: Misaligned MCC, currency, or settlement expectations surface as declines and accounting pain—not always as visible checkout errors.

[ ] Confirm countries, currencies, MCC, and settlement timeline with your acquirer.
[ ] Decide hosted vs integrated checkout; document PCI scope owners (see comparing hosted vs integrated).
[ ] Install a staging copy of the store; never run first payment tests only on production.
[ ] List success metrics: authorization rate, webhook latency, refund sync—tie to payment analytics later.

2. Plugin and credentials

[ ] Install the correct plugin for your processor from WooCommerce payment gateways (PatSaTECH or vendor).
[ ] Enter sandbox API keys first; restrict live keys to production only.
[ ] Store secrets in wp-config.php, environment variables, or a secrets manager—not in public repos.
[ ] Note webhook / callback URLs required by the processor and add them to the portal before live traffic.

3. Checkout UX

[ ] Enable guest checkout if appropriate; remove unnecessary fields that hurt conversion.
[ ] Verify mobile keyboards and field focus on real devices (not only desktop).
[ ] Align statement descriptor and site branding to reduce chargebacks—see chargebacks vs refunds.
[ ] Exclude cart, checkout, and account from aggressive full-page cache and minify—see common gateway mistakes.

4. Functional tests (sandbox)

[ ] Successful authorization and capture (or sale, per your model).
[ ] Declined card, insufficient funds, expired card.
[ ] Timeout / cancel mid-redirect (customer abandons).
[ ] Refund full and partial from Woo admin (if supported).
[ ] Webhook / IPN received—order status matches gateway.
[ ] Duplicate webhook delivery does not double-fulfill digital goods (idempotency).

Deep-dive: how to test your payment gateway like a pro. Async behavior: webhook monitoring for WooCommerce.

5. Subscriptions and renewals (if used)

[ ] Test renewal with sandbox timelines or gateway tools.
[ ] Failed renewal path updates subscription status and customer emails correctly.
[ ] Align token lifecycle with your gateway’s saved payment docs.

See subscriptions and payment gateways.

6. Go-live

[ ] Swap to live keys during a low-traffic window with rollback plan documented.
[ ] Run a small real transaction and refund it; verify both sides in Woo and the gateway.
[ ] Monitor error logs and gateway dashboards for 48 hours after switch.

If SSL or mixed content appears, fix before scaling traffic: insecure checkout and SSL.