Farewell letters are written to co-workers, friends or neighbours when you are leaving a place.
You can start the letter by addressing the person in a friendly way, so a “Dear Jane” kind of opening would be good.
At the beginning of the letter mention or confirm your departure. You can broadly give your reasons for leaving, be it an office or a neighbourhood without going into too many details.
It is good to thank the people you are leaving for the support and friendship they have offered during your stay there.
Depending on your reasons for departure and the familiarity you share with the person you are leaving, you can recount a couple of memorable incidents from the past.
Again, depending on the circumstances, you can express your regret at the departure. However, even if you are leaving for unpleasant reasons avoid any negative comments.
The final paragraph of the letter can express a wish to continue to keep in touch. You can leave your new address and phone numbers or e-mail id.
End the letter on a positive note by giving your best wishes to the reader.