Dear Vader,
By the time you read this, I’ll be dead. Here’s how I think it will happen: Tarkin will blow me up with the Death Star, then you and he will blow up Alderaan with the Death Star. Then Luke will enter and blow up Tarkin with the Death Star and try to kill you multiple times.
Sincerely,
Director Krennic
P.S. Then you and the Emperor will read this letter and kill each other.