A英文メール作成のお手伝い 著作権使用料の支払いに関して、米国法人にIRS発行のForm 6166(居住者証明)の取得と送付を依頼する英文メールですね。以下に作成例を記載します。 メール作成例 件名: Request for IRS Form 6166 - [貴社名] / [米国法人名] 本文: Dear [担当者名 or "Tax Department"], I hope this email finds you well. We are writing to request your assistance in obtaining a Certificate of Residence from the IRS, specifically IRS Form 6166, for [米国法人名] ([米国法人登録番号など、特定できる情報があれば追記]). This certificate is required for us to apply tax treaty benefits on royalty payments we will be making from our Japanese entity, [貴社名], to your U.S. entity. As per the Japan-U.S. Tax Treaty, such documentation is necessary to ensure the correct withholding tax rate is applied. Could you please arrange to obtain the Form 6166 for the relevant period and provide us with a PDF copy at your earliest convenience? If there is a specific process or documentation required from our side to facilitate this, please let us know. We understand that obtaining this form may take some time and effort, and we greatly appreciate your cooperation and support in this matter. Please do not hesitate to contact us if you have any questions or require further information. Thank you for your prompt attention to this request. Sincerely, [あなたの氏名][あなたの役職][貴社名][連絡先情報(電話番号、メールアドレス)]