Absence: Parents/Guardians of students are to notify the school office and the classroom homeroom teacher by phone, email, or in person before 8:30am on the day of each absence and state the reason. To ensure safety and whereabouts of the child the office staff or teacher personnel may contact you to confirm the absence by phone or email. Parents must turn in a doctor's note on the day it is received to have the child's absence excused. It is the responsibility of the parent/guardian to contact the child's teacher and front office each day about a child's absence.
http://handbook.la-archdiocese.org/chapter-13/section-13-2