There can be a situation when due to some reasons you should change your residence. In addition, if there is a chance to be transferred to anther branch of your company that can be a better solution than quit a job. The job transfer letter written in a proper way can bring good results. The below given sample can be used for that reason.
London Bank (A branch)
Dear Mr. Smith,
It is already 4 years that I have been working at this branch and I was devoted to our organization during all these years. Next month I am moving with my family to Cambridge since my wife had been offered a job there. This job opportunity is great and she was searching for that for a long time. The company had no any branches in London, therefore our family shuld move to Cambridge. For that reason, I request you to consider my job transfer to the branch in Cambridge. The transfer will be very beneficial for me. I do not want to quit the organization, which I am so loyal with and the work for the Bank in other city can be a solution.
I hope for you understanding. Please, consider my request.