Please accept my sincere apology for the long deep scratches on the back of your car I caused this morning.
My friends and I were riding our bikes in the street, and I did not pay attention to where I was going. This was when I accidently scratched your car. This was caused by my bicycle’s handlebars, as I was passing by on high speed. I have observed deep scratches on the boot of your car and paint scratched off. Please know I did not do it on purpose. I shall try to be more careful in the future.
I take full responsibility for my actions. I will cover the entire cost of repairs using my own savings. Please send all the bills to me. I understand it is a great inconvenience to you. I am really sorry.