Dear {Recipient},

I'm very sorry for serving you a bad meal on {date} at {location/event}. You expected to have a good time and I let you down.

As your {host/caterer}, I should have been better prepared to ensure that your food was presentable and
palatable. Rest assured that I have gone over this incident thoroughly and noted what went wrong so that I can prevent this from happening again in the future.

Please accept my offer of a complimentary meal as a token of apology. Do let me know when you're available!

Sincerely,

{Your Name}

Dear [Name],

I am writing to apologize for the spoiled ingredients that were delivered to you. I understand that this has caused you a great deal of inconvenience, and I am truly sorry for the trouble it has caused.

I take full responsibility for this mistake and I want to assure you that we are taking steps to ensure that it does not happen again. We have implemented a new system to check the quality of our ingredients before they are shipped out, and we are also conducting regular inspections to ensure that all of our ingredients are fresh and of the highest quality.

I understand that this mistake has caused you to lose time and money, and for that I apologize. I would like to offer you a full refund for the spoiled ingredients, as well as a discount on your next order. I hope that this will help to make up for the trouble that this mistake has caused.

I am truly sorry for the trouble that this has caused you, and I want to assure you that we are doing everything we can to ensure that this does not happen again. If you have any further questions or concerns, please do not hesitate to contact me.

Sincerely,

[Your Name]