If you know you have offended someone, you need to make things right. Go to the person for a face-to-face meeting or call on the phone if it is not possible to go in person. Say to the person you have offended, “God has convicted me of my sin against you. I have come to ask, “Will you forgive me?” Remain silent and wait for a response.
Keep the following in mind: (1) Do not say, “I’m sorry,” say, “Will you forgive me?” There is a world of difference. (2) Do not say, “If I have offended you,” instead say, “God has convicted me of my sin against you.” (3) Do not involve anyone other than the person who has been offended by you. It is unnecessary and may even be unwise. (4) If the person does not immediately forgive you, be patient and wait for God to work in their heart.
Dr. John Adams