Subject: Apology Letter for Sending Wrong Attachment 送错附件
Dear Mr. Chan,
I wish to express my apologies for sending a wrong attachment on the mail sent on 9 April under the subject “Request for information on NY venue”. I understand this might have brought up inconveniences （带来不便） to you and others relying on the attachment.
I will not give excuses （藉口） for what happened as I understand it is my obligation （义务） to ensure that the correct document is attached. Attached to this mail is the correct document.
Subject: Apology Letter for Sending Wrong Information 发送错误信息
Dear Dr. Wong,
I wish to offer my apologies for sending the wrong information on the email dated 7 April under the subject “Here’s the quote we discussed”. I understand the wrong information might have brought inconveniences on your end. The correct information ought to have been [更正后的信息].
I am sorry that I brought up the inconveniences and I will ensure to be cautious in future to avoid such an incident.
Thank you for your understanding and continued support.