Apology Letter for Mistake to Boss/Client

It is the focus of every business to make his clients happy and satisfied with their dealings and they would suggest their services to other potential clients. It is human nature that everyone makes errors, and it is totally unintentional no one does it with one’s will. Sometimes these mistakes are unavoidable. Perhaps a simple mistake makes your customer annoy or make your boss worried. In this case, you can send the apology letter for your mistake to your client in a good gesture for a firm to maintain its status and find the solution to improve your relationship with your customer.

The following are the samples of different situations and you can use these letters to your customers for the apology.

Apology Letter to Boss for a Mistake


Dear [Recipient]

I owe you [mention company name, business, or firm] for the honest apology as of delivering you the wrong info [mention situation].

It was truly not my intention to generate such type of inconvenience and uncomfortable situation. I hope that I will be given the chance of correcting my errors and resolve the matter in an appropriate way.

Though I have caused this unfavorable experience, I can see where I was wrong [define the cause of your mistake]. I believe this mistake will help me to learn more and prevent me to repeat the same errors in the future. 

You can feel free to share your thoughts and worries with me about this matter. You can contact me through my [mobile number, email].

Best regards


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Apology letter to client for a mistake

In business dealing, we unintentionally do mistakes that can ruin your image in front of your clients. In that case, you can write an apology letter in a straightway.

Sample Letter


John Andrews,
F-67, Eden Heights, Sputnik Street
Michigan, USA

Subject: Apology letter to client for a mistake

Dear Andrews,

I, Anderson, the branch manager of Stars leather Company, am writing this letter on behalf of my company for an apology. Leela Sarton is a junior customer services officer and she sent you wrong invoices on 01-05-20XX through email. I am very sorry to know that her mistake caused some serious problems for you. It also caused problems for our accounts department. I know she should have been more vigilant while sending invoices to the potential clients like you. Such a mistake was not being expected from her because she was trained for three months before she joined the office.

Our company emphasizes on providing the best services to our clients and that is why they believe us. We have zero-tolerance for nonprofessional behavior exhibited by our employees. It was unfortunate that you faced a problem owing to our employee’s mistake and the company says you sorry for this act of negligence and takes full responsibility for any pain or inconvenience caused to you. It will be made sure that such an incident would not happen in the future. We will not only rectify the issue but also set an example for the others to follow.

As a compensatory stance, the company is offering you a free shopping coupon of $100 to be used at any of our outlets. We will provide you with our best services and at the same time hope that this incidence is not going to harm our relationship with you.



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These types of apology letters help you to improve your image again in front of your clients and cover your mistakes.

Apology Letters for Mistake at Work


I am writing to apologize to you for not being well prepared for the presentation today. I could not answer the client’s questions and failed to satisfy him. I take complete responsibility for this and feel extremely sorry.

I would be really grateful to you if you give me another chance. I will rearrange our meeting with the client and will request him to let me deliver the presentation again. I assure you there will be no mistakes this time.

Please accept my apology. I shall really appreciate your kindness.


I sincerely apologize to the management for the error in the XYZ report. The issue occurred due to our new sales project which took my focus away from the report. However, it was my responsibility to perform both tasks flawlessly. I am, therefore, regretful for my mistake.

I will reorganize the data and submit the corrected report within 2 days. Your cooperation will be highly appreciated.


I express my deep regret at forgetting to inform Mr. XYZ about the new time for his meeting with us. He is one of our most important clients and my mistake could have cost us a lot. I have personally apologized to him and seek your forgiveness too. I will make sure no negligence takes place in the future.

Once again, I am extremely sorry for the mishap. I shall be more careful in the future.


I am writing to apologize to you for the error in the quoted prices. I have enclosed the updated price list for the products you requested.

Please forgive me for the earlier mistake. I hope it didn’t cause any inconvenience to you. You are our valued client and we look forward to serving you in the future as well.


I am writing to apologize to you for not providing you the requested data on time which caused you to miss the deadline for your report. I understand that my negligence put you in trouble with the manager. I have sent him an email explaining to him that it has been my fault. The misunderstanding about your performance has been clarified.

I will make sure such an incident never happens again. I am sorry for my mistake and hope it does not affect our professional as well as personal relationship as colleagues.

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