The correct test credit card numbers for your Stage site will depend on the payment provider.
Payment Express
eWay
PayPal
Step-by-step guide
To check your online payment provider:
- Login as an Administrator.
- Navigate to Settings -> Orders tab -> Credit Cards tab.
- Locate the setting labelled 'C/Card Payment Provider'.
- The Provider for your site will be shown here (eg. Payment Express, eWay Rapid API, Dialect, etc).