I am writing to inform you that I will be leaving my position (Driver) here at (Organisation) on account of my family illness and is going to require frequent visits to a specialist in or another city. I will be unable to fulfill the commitments of my position here for the foreseeable future. According to my contract, I leave you with my 1 month notice, and my last day here will be 31 OCT 2015. I will complete the last of my duties by that day. Thank you for your continued support. Please let me know if there is anything I can do to ease the transition in any way.