sir I have to write open letter in the Supreme Court, so I have the trouble of telling you how I can write it.
Hey!
There is no special procedure for it. But, remember that you are writing a letter to the highest office of judiciary. Kindly, ensure that your words are not hurting or violating any rules. Deliver a humble and polite letter that tells about the real issue or the real life situation in India.
If you're not sure about your handwriting, you can use a computer and printer. The font should be Times New Roman and in 16+ size. Use government postal service instead of private courier. It avoids the need of someone to sign and receive the courier.
Address in the letter:
The Registrar,
Supreme Court of India,
Tilak Marg, Mandi House,
New Delhi-110 201 (India)
Thank you.