Dear {Recipient},

I'm sorry things ended between you and {client}. I know you think I took your client from you, but I would never do that to a colleague. {Client} explained to me that their contract with {you/your business} had already expired and they chose to do business with a different {company/freelancer} after that.

Even though we work in the same industry, I never saw you as competition and I would never resort to underhanded tactics such as stealing other people's clients. I wish you all the best.

Respectfully,
{Your Name}

Dear [Name],

I am writing to apologize for my unprofessionalism during our last meeting. I understand that my behavior was inappropriate and I regret that I did not act in a more professional manner.

I understand that my behavior was not in line with the standards of professionalism that you expect from me. I take full responsibility for my actions and I am sorry for any inconvenience that I may have caused.

I have taken the time to reflect on my behavior and I have come to the realization that I need to be more mindful of my actions and words in the workplace. I understand that my behavior was unacceptable and I am committed to making sure that it does not happen again.

I am also aware that my unprofessionalism may have caused you to question my commitment to the company and I want to assure you that I am still committed to doing my best work. I understand that my actions have caused you to doubt my dedication to the company and I am sorry for that.

I am committed to learning from this experience and I am determined to become a more professional member of the team. I am confident that I can regain your trust and I am willing to do whatever it takes to prove to you that I am a reliable and professional employee.

Once again, I apologize for my unprofessionalism and I am committed to making sure that it does not happen again.

Sincerely,

[Your Name]

Dear [Name],

I am writing to apologize for my unprofessional conduct during our meeting last week. My behavior was inappropriate and I regret it deeply.

I understand that I should have been more professional and respectful during our conversation. I should have been more mindful of your feelings and the situation at hand. Instead, I allowed my emotions to get the best of me and I acted in a way that was not appropriate.

I apologize for any distress or discomfort I may have caused you. I understand that I have a responsibility to maintain a professional attitude and demeanor when interacting with colleagues and customers. I take my job seriously and I am committed to upholding the highest standards of professionalism.

I want to assure you that this was an isolated incident and it will not happen again. I have taken the necessary steps to ensure that I will not repeat this mistake. I am also taking the time to reflect on my behavior and to learn from this experience.

Once again, I apologize for my unprofessional conduct and I am truly sorry for any distress or discomfort I may have caused you. I am committed to maintaining a high standard of professionalism in all of my interactions.

Sincerely,

[Your Name]

Dear [Name],

We would like to start by expressing our sincerest apologies for the unsatisfactory service you received from our company. We understand that this experience was not up to the standards that we strive to provide, and we are sincerely sorry for any inconvenience this has caused.

At [Company], we take pride in providing our customers with the highest quality of service. We understand that this experience has not been up to our usual standards, and we apologize for any dissatisfaction you may have experienced. We take all customer feedback seriously, and we are actively working to improve our services.

We understand that this experience has caused you a great deal of frustration and inconvenience. We would like to offer you a [discount/free product/etc.] as a gesture of goodwill. We hope this will help to make up for the inconvenience you have experienced.

We value your business and we want to ensure that you have the best experience possible. We are committed to providing our customers with the highest quality of service, and we are sorry that we have not met your expectations.

Once again, we apologize for the unsatisfactory service you received from our company. We hope that you will consider giving us another chance to prove our commitment to providing excellent customer service.

Sincerely,

[Your Name]

[Company Name]