EmailMissingError
Example
{
	"code": "EmailMissingError",
	"target": "Unknown",
	"details": [
		{
			"code": "EmailMissingError",
			"number": 16,
			"message": "Missing email address.",
			"description": "An email address is required for this operation.",
			"faultCode": "Client",
			"helpLink": "http://developer.avalara.com/avatax/errors/EmailMissingError",
			"severity": "Error"
		}
	]
}
Explanation

This indicates that you failed to provide an email address with this request. Please try again using a valid email address.