紧急请帮我翻译一下这句话！经过调查 我们确定你所持有的发票并非由我司出具。 特此声明。

经过调查 我们确定你所持有的发票并非由我司出具。 特此声明。
We hereby notify that we make sure the invoice you hold is not issued by our company through the investigation.

After investigation we have determined you are not held by invoices issued by the Secretary for me. It is declared.
(Google翻译，仅供参考)

After investigation we have determined you are not held by invoices issued by the Secretary for me. It is declared.

After investigation we have determined you are not held by invoices issued by the company. It is declared.

After investigation, we determine the invoice you hold was not issued by our company . Hereby statement.