Format: 1 Title.
2. Text: Sincerely explain the reasons why the other party is unhappy; I apologize, please understand and forgive me.
3. Signature and date.
Example:
Apologize to customers
Deacon:
We have received your order for the 22nd of this month. I'm very sorry! Down vest can't be delivered at present. Our earliest delivery date is early July.
Of course, you are in a hurry to get the goods. However, the demand far exceeds our previous experience, and we apologize!
Your loyal XXX
X year x month x day