InadequateUniqueAddresses
Example
{
	"code": "InadequateUniqueAddresses",
	"target": "Unknown",
	"details": [
		{
			"code": "InadequateUniqueAddresses",
			"number": 2209,
			"message": "Inadequate unique addresses",
			"description": "In order for the company to be certified, there should be at least two unique addresses in the documents, in the past month or among the last 100 documents.",
			"faultCode": "Client",
			"helpLink": "http://developer.avalara.com/avatax/errors/InadequateUniqueAddresses",
			"severity": "Error"
		}
	]
}
Explanation

For company certification, recent documents must show at least 2 unique addresses. Recent documents include those from the past month or the last 100 documents. This error indicates that your most recent documents have fewer than 2 unique addresses.