.xml

<createCustomerProfileRequest xmlns="AnetApi/xml/v1/schema/AnetApiSchema.xsd"> 
   <merchantAuthentication>
     <name>[redacted]</name>
     <transactionKey>[redacted]</transactionKey>
    </merchantAuthentication>
   <profile>
     <merchantCustomerId>[redacted]</merchantCustomerId>
     <description></description>
     <email>tester+test@gmail.com</email>
     <paymentProfiles>
       <customerType>individual</customerType>
        <payment>
          <creditCard>
            <cardNumber>4111111111111111</cardNumber>
            <expirationDate>2020-12</expirationDate>
          </creditCard>
         </payment>
      </paymentProfiles>
    </profile>
	<validationMode>testMode</validationMode>
  </createCustomerProfileRequest>
  
  
  <?xml version="1.0" encoding="utf-8"?> 
<createCustomerProfileResponse xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="AnetApi/xml/v1/schema/AnetApiSchema.xsd">
  <messages>
    <resultCode>
      Error
    </resultCode>
    <message>
      <code>
        E00013
      </code>
      <text>
        email is invalid.
      </text>
    </message>
  </messages>
</createCustomerProfileResponse>