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Payer Authentication Configuration Testing {#pa2-intro-testing}
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After the payer authentication functionality is enabled for your account and you have installed and configured the software, you must run tests to ensure that payer authentication is working properly. You must ensure that the proper data is being collected and sent to the issuer and that the proper status for a particular circumstance is returned. To ensure that the proper statuses are returned under all possible circumstances, extensive testing is required before you go live with payer authentication.  
A sandbox testing environment is provided to resolve any bugs in your system. In this testing environment, you can simulate various transaction scenarios with the types of payment cards that you accept. Test card numbers for the various types of payment cards are provided so that you can run transaction simulations. You can verify that the values generated during the simulations are the correct values that should occur during that transaction scenario.  
When your test results are correct, contact customer support and request to go live. When you go live, you will use the production host name to process transactions instead of the test host name that you used when processing transactions in the test environment.  
The host name for the testing environment:  
The host name for the production environment:  
Details about testing your payer authentication configuration are available in the [Testing Payer Authentication Services](/content/cybsdeveloper2021/amer/en/docs/barclays/en-us/payer-authentication/developer/all/rest/payer-auth/pa-testing-intro.md "") section.
