2nd January, 2012
This is to update you that I will be leaving my job here in Waterfront Insurance Company at the end of this month and I am joining a different company at the same position.
I do understand this is on very short notice and would like to thank you for your support. I also want to express my thank you for the support you have given me over the years when I worked under you. You can contact me at my personal home number which is 123-456-7890 or on my personal email address (email@example.com). Please do keep in touch.