How do I test Authorize.net payment without charging a card?

3. Before we notify customers the form is available, we would like to test its functionality. However, we are unable to test the Authorize.net section in Sandbox mode (API will not function), is there a way to test this form successfully without charging a card?

You may create a Sandbox account using the following URL so that you can test the payments on your form.

https://developer.authorize.net/hello_world/sandbox/

You may login to the sandbox account using https://sandbox.authorize.net/ and get the test API key and use them in the Authorize.net integration wizard on the form/

Also, the test credit card numbers are provided in the following link fo the following ink.

https://developer.authorize.net/hello_world/testing_guide/

Hope this information helps!