A letter of apology was a formal letter used to express apology and apology to someone. The following is the format and model of an apology letter for your reference: Dear [recipient's name], I'm writing this letter to express my apologies to you. I am deeply aware that my actions have caused you inconvenience and trouble, and I am deeply sorry for this. I understand that my actions were wrong and I deeply regret it. I assure you that I will take all necessary measures to ensure that this does not happen again. I hereby apologize to you and ask for your forgiveness. If you have any needs, I will do my best to meet them. Once again, I apologize to you. sincerely salute [Your name] An apology letter: Dear [recipient's name], I'm writing this letter to express my apologies to you. I am deeply aware that my actions have caused you inconvenience and trouble, and I am deeply sorry for this. I understand that my actions were wrong and I deeply regret it. I assure you that I will take all necessary measures to ensure that this does not happen again. I hereby apologize to you and ask for your forgiveness. If you have any needs, I will do my best to meet them. Once again, I apologize to you. sincerely salute [Your name]