How do you write a bonafide certificate for bus pass to college principal?

To write a bonafide certificate for a bus pass to the college principal, begin by addressing the principal with the appropriate salutation. State the purpose clearly, mentioning the student's name, course, and enrollment details, and indicate that the certificate is being requested for obtaining a bus pass. Include a statement confirming the student's attendance at the college, and conclude with your name, designation, and contact details for verification. Sign the document at the bottom.