In my last 7 years of service as a WO I wrote my own assesments 6 times and had only one written by my, then Wg Cdr, boss. I accept that my last years were a tad unusual but it brought home to me that there are times in your life when write ups matter and times that they don't. If the final eulogy was sincerley meant by a boss that knew you and meant what he/she said then it would be worth something. The current letter is formulaic, probably self written, and comes across as just that. By the time you leave the mob you will know in your own mind how good a job you've done and if you need a valid write up for a future career then write it yourself with a clearer idea of what you need to say to impress your future employer. Sign and date it with an old bosses name (cal him first if you suffer from a conscience) and get on with your life.