_________ (mention recipient’s details)
Date: __/__/_____ (date)
Subject: Apology for Mistake
On behalf of ___________ (name of the company), I am writing this letter to offer my sincere apology regarding the ______________(mistake/misunderstanding/mishappening/mention reason in brief).
We have realized our mistake and came to the conclusion that due to the _______________ (mention reason – miscommunication/poor service/other) you had to face this issue. Our team have taken serious action regarding this matter and we ensure you that this will not happen again in the future.
We regret that we could not serve you well, I hope you will understand our situation. Kindly, accept our apology and give us another chance to serve you better. Thank you for your support and patience.