Dear {Recipient}
I owe you an apology for what happened with {situation}.
You were not treated with the respect, dignity and fairness you deserved. It was never my intention to cause any offense and I hope my actions did not cause any irreparable damage to our relationship.
Please accept my apologies and be rest assured that something like this won’t happen again. This experience has taught me to consider the consequences and refrain from impulsive actions.
If you have any thoughts you would like to share, please don’t hesitate to {call/email} me at {phone, email}.
Sincerely,
{Sender}
{Sender}
