Ecommerce payment integration

Integration approaches

Keep card data with the provider

Whichever approach you choose, card details should be entered into the payment provider's secure fields or pages, not stored or processed by your own store. This keeps sensitive data out of your systems and greatly reduces your security and compliance obligations. Established providers also handle customer authentication steps, such as additional verification by the card issuer, as part of the payment flow.

Ask your provider which security and compliance responsibilities remain with you for the integration you choose.

What to test

Choosing payment methods

• Cards

  Expected by nearly all online shoppers.

• Digital wallets

  Faster checkout on phones for customers who use them.

• Pay later options

  Can suit higher-value purchases; check terms and fees.

• Bank transfer or invoice

  Common for trade customers; needs manual reconciliation.

How payment integration is done

1. 01

   Choose

   Provider and methods selected; account opened in your name.

   Output: Provider account

2. 02

   Connect

   Integration configured in test mode.

   Output: Test integration

3. 03

   Test

   Every method, failure case, refund and email tested.

   Output: Test record

4. 04

   Go live

   Live keys enabled; first real orders monitored.

   Output: Live payments

Order status and notifications

Payments do not always complete instantly: some require extra verification, others are confirmed later by the provider. A robust integration listens for the provider's confirmation and updates the order accordingly, rather than assuming payment succeeded when the customer returns to the store. Getting this right prevents orders being fulfilled without payment, or paid orders sitting unprocessed.

Handling failed payments well

Payments fail for ordinary reasons: insufficient funds, a mistyped number, a bank's fraud check or an abandoned verification step. The checkout should explain clearly what happened and let the customer try again or choose another method, without losing their basket. Vague errors or empty baskets after a failure lose sales that could easily have been recovered.

Reviewing the provider's dashboard for patterns of failures can reveal configuration problems.

Refunds and disputes

Refunds should be issued through the store or the provider in a way that keeps order records accurate. Partial refunds, for example for one item in a multi-item order, should be tested too. Disputes or chargebacks are handled through the provider; knowing where to find them and the evidence you may need, such as proof of delivery, prepares you for when they occur.

Payments on phones

Many customers pay on phones, where typing card details is awkward. Digital wallets, saved payment details with the provider and well-designed card fields reduce effort. Testing the whole payment flow on a phone, including any verification step in a banking app, shows what customers really experience.

Keep a record

Note which provider, methods and settings are used, and where keys are stored securely. This helps whoever maintains the store later.

Selling internationally

If you sell abroad, decide whether to show prices in local currencies, which payment methods customers in each country expect and how currency conversion fees affect margins. Providers differ in their support for local methods and currencies, which can influence the choice. Test checkout with an international address and currency before promoting to overseas customers.