Lawyers, advisors, and therapists can use this professional goodbye letter to end a relationship with a client.
I have had the greatest pleasure working with you for the last {amount of time}. However, I must inform you that our professional relationship is coming to a close. I am departing my position at {company} to pursue {parenting, retirement, underwater basket weaving, etc.}.
My last day with {company} is {date}. While I will no longer be handling your case thereafter, I encourage you to keep in touch with me whenever you like. My email address is {address} and you can reach me at my work number at {phone number}.
I greatly appreciate your patronage over the years and wish you all the best.