Hi,
For a joining letter, I suggest this.
Put your address in the top right corner, followed by the date.
Below that, and on the left, put the name and address of the person you are writing to.
Then put this.
Dear Mrs. Smith,
Please note that I started my job as a teller with your bank on Feb. 4th., 2007.
Yours sincerely,
sign your name
Then print your name.
I don't know what an induction manual is. Can you tell me?
Best wishes, Clive