It's Your Name here at Your Company. I'm reaching out to let you know that your order will delayed due to some production issues. We apologize for the convenience and promise to update you once it's resolved. Thank you so much for your patience.
A good apology letter should start with a sincere expression of regret and acknowledgment of the mistake. Take responsibility for your actions, explain what went wrong, and express empathy towards the affected party. Promise to make amends and avoid repeating the mistake.
I would like to apologize for the damage my daughter caused to your window. Please send me the repair bill, so I can reimburse you. I assure you that this will not happen again. If there is anything else I can do for you, please let me know.
Please accept our heartfelt apologies for any inconvenience or disappointment this delay may have caused. We understand the impact of this delay on your plans and assure you that we are taking immediate steps to expedite the delivery process and prevent similar occurrences in the future.