Your clients will want assurance that the service they have been used to will not be adversely impacted and the account will be in good hands after you leave. Two weeks notice is common.
So, keep the letter brief. If you are in an industry that relies on client referrals, then you will want to bring your clients with you. Write an Effective Letter to Your Clients Be professional, positive and gracious in your letter, thanking your former employer and current clients for the role they have played in your success.
The trick here is to follow-up and make sure the company notifies your clients before you leave—otherwise you will end up looking like the unprofessional fool. Thank you very much for the opportunities for professional and personal development that you have provided me during the last five years.
My last working day will be September 30, On the one hand, you'll be keen to say goodbye and start the next chapter in your career.
It's up to you how generous you want to be. Something as simple as a follow-up ruins the entire customer experience, which, according to research by Walkeris one of top factors for doing business with a company.