contacts and other important facts your organization has to know. The conclusion is also a polite part of the note.
Here are the potential mistakes to avoid:
Incorrect spelling of names
No reason for leaving a school or job
No contact details
Enough room for interpretation
Way too many unnecessary details
It is always better to limit a leave letter to not more than two pages. Sticking to 1-page format is the greatest thing to do. It is also important to add your address and name to the upper page